Update documentation for Gun 1.0

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diff --git a/docs/en/cowboy/2.2/guide/constraints/index.html b/docs/en/cowboy/2.2/guide/constraints/index.html
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diff --git a/docs/en/cowboy/2.2/guide/erlang_web/index.html b/docs/en/cowboy/2.2/guide/erlang_web/index.html
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diff --git a/docs/en/cowboy/2.2/guide/flow_diagram/index.html b/docs/en/cowboy/2.2/guide/flow_diagram/index.html
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diff --git a/docs/en/cowboy/2.2/guide/handlers/index.html b/docs/en/cowboy/2.2/guide/handlers/index.html
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diff --git a/docs/en/cowboy/2.2/guide/index.html b/docs/en/cowboy/2.2/guide/index.html
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diff --git a/docs/en/cowboy/2.2/guide/introduction/index.html b/docs/en/cowboy/2.2/guide/introduction/index.html
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diff --git a/docs/en/cowboy/2.2/guide/listeners/index.html b/docs/en/cowboy/2.2/guide/listeners/index.html
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diff --git a/docs/en/cowboy/2.2/guide/loop_handlers/index.html b/docs/en/cowboy/2.2/guide/loop_handlers/index.html
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diff --git a/docs/en/cowboy/2.2/guide/middlewares/index.html b/docs/en/cowboy/2.2/guide/middlewares/index.html
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diff --git a/docs/en/cowboy/2.2/guide/migrating_from_1.0/index.html b/docs/en/cowboy/2.2/guide/migrating_from_1.0/index.html
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diff --git a/docs/en/cowboy/2.2/guide/migrating_from_2.0/index.html b/docs/en/cowboy/2.2/guide/migrating_from_2.0/index.html
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diff --git a/docs/en/cowboy/2.2/guide/migrating_from_2.1/index.html b/docs/en/cowboy/2.2/guide/migrating_from_2.1/index.html
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diff --git a/docs/en/cowboy/2.2/guide/migrating_from_2.2/index.html b/docs/en/cowboy/2.2/guide/migrating_from_2.2/index.html
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diff --git a/docs/en/cowboy/2.2/guide/modern_web/index.html b/docs/en/cowboy/2.2/guide/modern_web/index.html
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diff --git a/docs/en/cowboy/2.2/guide/multipart/index.html b/docs/en/cowboy/2.2/guide/multipart/index.html
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diff --git a/docs/en/cowboy/2.2/guide/req/index.html b/docs/en/cowboy/2.2/guide/req/index.html
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diff --git a/docs/en/cowboy/2.2/guide/req_body/index.html b/docs/en/cowboy/2.2/guide/req_body/index.html
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diff --git a/docs/en/cowboy/2.2/guide/resource_design/index.html b/docs/en/cowboy/2.2/guide/resource_design/index.html
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diff --git a/docs/en/cowboy/2.2/guide/resp/index.html b/docs/en/cowboy/2.2/guide/resp/index.html
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diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.path/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.path/index.html
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diff --git a/docs/en/cowboy/2.2/manual/cowboy_req.set_resp_body/index.html b/docs/en/cowboy/2.2/manual/cowboy_req.set_resp_body/index.html
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--- a/docs/en/cowboy/2.2/manual/cowboy_req/index.html
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@@ -7,8 +7,6 @@
     <meta name="description" content="">
     <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
 
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     <title>Nine Nines: cowboy_req(3)</title>
 
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diff --git a/docs/en/cowboy/2.2/manual/cowboy_rest/index.html b/docs/en/cowboy/2.2/manual/cowboy_rest/index.html
index dfab37b5..9efdf61f 100644
--- a/docs/en/cowboy/2.2/manual/cowboy_rest/index.html
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@@ -7,8 +7,6 @@
     <meta name="description" content="">
     <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
 
-    <meta name="generator" content="Hugo 0.37.1" />
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     <title>Nine Nines: cowboy_rest(3)</title>
 
     <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
diff --git a/docs/en/cowboy/2.2/manual/cowboy_router.compile/index.html b/docs/en/cowboy/2.2/manual/cowboy_router.compile/index.html
index a73996dc..129cab1f 100644
--- a/docs/en/cowboy/2.2/manual/cowboy_router.compile/index.html
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@@ -7,8 +7,6 @@
     <meta name="description" content="">
     <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
 
-    <meta name="generator" content="Hugo 0.37.1" />
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     <title>Nine Nines: cowboy_router:compile(3)</title>
 
     <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
diff --git a/docs/en/cowboy/2.2/manual/cowboy_router/index.html b/docs/en/cowboy/2.2/manual/cowboy_router/index.html
index 81f239b4..94b6438d 100644
--- a/docs/en/cowboy/2.2/manual/cowboy_router/index.html
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@@ -7,8 +7,6 @@
     <meta name="description" content="">
     <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
 
-    <meta name="generator" content="Hugo 0.37.1" />
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     <title>Nine Nines: cowboy_router(3)</title>
 
     <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
diff --git a/docs/en/cowboy/2.2/manual/cowboy_static/index.html b/docs/en/cowboy/2.2/manual/cowboy_static/index.html
index 1e18e4a2..6c6d8ca6 100644
--- a/docs/en/cowboy/2.2/manual/cowboy_static/index.html
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@@ -7,8 +7,6 @@
     <meta name="description" content="">
     <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
 
-    <meta name="generator" content="Hugo 0.37.1" />
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     <title>Nine Nines: cowboy_static(3)</title>
 
     <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
diff --git a/docs/en/cowboy/2.2/manual/cowboy_stream/index.html b/docs/en/cowboy/2.2/manual/cowboy_stream/index.html
index 7095a171..1e2e3b35 100644
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@@ -7,8 +7,6 @@
     <meta name="description" content="">
     <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
 
-    <meta name="generator" content="Hugo 0.37.1" />
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     <title>Nine Nines: cowboy_stream(3)</title>
 
     <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
diff --git a/docs/en/cowboy/2.2/manual/cowboy_websocket/index.html b/docs/en/cowboy/2.2/manual/cowboy_websocket/index.html
index f2c975b3..90bae6a8 100644
--- a/docs/en/cowboy/2.2/manual/cowboy_websocket/index.html
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@@ -7,8 +7,6 @@
     <meta name="description" content="">
     <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
 
-    <meta name="generator" content="Hugo 0.37.1" />
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     <title>Nine Nines: cowboy_websocket(3)</title>
 
     <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
diff --git a/docs/en/cowboy/2.2/manual/http_status_codes/index.html b/docs/en/cowboy/2.2/manual/http_status_codes/index.html
index 95f62853..a76f19ca 100644
--- a/docs/en/cowboy/2.2/manual/http_status_codes/index.html
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@@ -7,8 +7,6 @@
     <meta name="description" content="">
     <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
 
-    <meta name="generator" content="Hugo 0.37.1" />
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     <title>Nine Nines: HTTP status codes(7)</title>
 
     <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>
diff --git a/docs/en/cowboy/2.2/manual/index.html b/docs/en/cowboy/2.2/manual/index.html
index 35dd5d68..24224831 100644
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     <meta name="description" content="">
     <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
 
-    <meta name="generator" content="Hugo 0.37.1" />
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     <title>Nine Nines: Cowboy Function Reference</title>
 
     <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic' rel='stylesheet' type='text/css'>