Remove the dependency on Ranch

We instead of two new modules, gun_tcp and gun_tls.
They only have 6 functions so far, much less than
what Ranch provided before.

Also renames ssl to tls where applicable. It's still
possible to use the ssl transport option but it's now
undocumented.

4 files changed, 11 insertions, 12 deletions

diff --git a/doc/src/guide/connect.asciidoc b/doc/src/guide/connect.asciidoc
index e0b09d6..f7983bc 100644
--- a/doc/src/guide/connect.asciidoc
+++ b/doc/src/guide/connect.asciidoc
@@ -34,9 +34,9 @@ The `gun:open/{2,3}` function must be used to open a connection.
 {ok, ConnPid} = gun:open("example.org", 443).
 
 If the port given is 443, Gun will attempt to connect using
-SSL. The protocol will be selected automatically using the
+TLS. The protocol will be selected automatically using the
 ALPN extension for TLS. By default Gun supports HTTP/2
-and HTTP/1.1 when connecting using SSL.
+and HTTP/1.1 when connecting using TLS.
 
 For any other port, Gun will attempt to connect using TCP
 and will use the HTTP/1.1 protocol.
@@ -47,10 +47,10 @@ options. The manual documents all available options.
 Options can be provided as a third argument, and take the
 form of a map.
 
-.Opening an SSL connection to example.org on port 8443
+.Opening a TLS connection to example.org on port 8443
 
 [source,erlang]
-{ok, ConnPid} = gun:open("example.org", 8443, #{transport=>ssl}).
+{ok, ConnPid} = gun:open("example.org", 8443, #{transport => tls}).
 
 === Waiting for the connection to be established
 
diff --git a/doc/src/guide/start.asciidoc b/doc/src/guide/start.asciidoc
index 6d93e2e..17cbe87 100644
--- a/doc/src/guide/start.asciidoc
+++ b/doc/src/guide/start.asciidoc
@@ -27,7 +27,7 @@ use it.
 [source,erlang]
 ----
 1> application:ensure_all_started(gun).
-{ok,[ranch,crypto,cowlib,asn1,public_key,ssl,gun]}
+{ok,[crypto,cowlib,asn1,public_key,ssl,gun]}
 ----
 
 === Stopping
diff --git a/doc/src/manual/gun.asciidoc b/doc/src/manual/gun.asciidoc
index b5ed039..b15ce09 100644
--- a/doc/src/manual/gun.asciidoc
+++ b/doc/src/manual/gun.asciidoc
@@ -149,7 +149,7 @@ opts() :: #{
     retry           => non_neg_integer(),
     retry_timeout   => pos_integer(),
     trace           => boolean(),
-    transport       => tcp | ssl,
+    transport       => tcp | tls,
     transport_opts  => [gen_tcp:connect_option()] | [ssl:connect_option()],
     ws_opts         => ws_opts()
 }
@@ -175,11 +175,11 @@ protocols - see below::
 
 Ordered list of preferred protocols. When the transport is `tcp`,
 this list must contain exactly one protocol. When the transport
-is `ssl`, this list must contain at least one protocol and will be
+is `tls`, this list must contain at least one protocol and will be
 used to negotiate a protocol via ALPN. When the server does not
 support ALPN then `http` will always be used. Defaults to
 `[http]` when the transport is `tcp`, and `[http2, http]` when the
-transport is `ssl`.
+transport is `tls`.
 
 retry (5)::
 
@@ -196,12 +196,12 @@ only be used during debugging.
 
 transport - see below::
 
-Whether to use SSL or plain TCP. The default varies depending on the
-port used. Port 443 defaults to `ssl`. All other ports default to `tcp`.
+Whether to use TLS or plain TCP. The default varies depending on the
+port used. Port 443 defaults to `tls`. All other ports default to `tcp`.
 
 transport_opts ([])::
 
-Transport options. They are TCP options or SSL options depending on
+Transport options. They are TCP options or TLS options depending on
 the selected transport.
 
 ws_opts (#{})::
diff --git a/doc/src/manual/gun_app.asciidoc b/doc/src/manual/gun_app.asciidoc
index 606d9fb..c369095 100644
--- a/doc/src/manual/gun_app.asciidoc
+++ b/doc/src/manual/gun_app.asciidoc
@@ -19,7 +19,6 @@ to the server and reconnects automatically when necessary.
 
 == Dependencies
 
-// @todo I do not want a dependency on Ranch, remove it
 * link:man:cowlib(7)[cowlib(7)] - Support library for manipulating Web protocols
 * ssl - Secure communication over sockets