replace quoted:from_url with cowboy_http:urldecode

This change makes the dependency on quoted optional
by adding a minimal urldecode function to cowboy.

A protocol option for setting the urldecoding function
has been added to the cowboy_http_protocol module.
The default value for this option is set to be
equivalent to the default settings for quoted.

{fun cowboy_http:urldecode/2, crash}

A note has been added in the README to document
how to use quoted instead of this function.

A field to store this option value has been added
to the state record in the cowboy_http_protocol
module and the http_req record in include/http.hrl

Functions that previously used quoted:from_url/1
has been updated to require an equivalent function
in addition to the previously required arguments.

This change removes a C compiler from the build
requirements of cowboy. It also removes the requirement
to cross compile the code if the target arch/OS
is different from the arch/OS used to build it.

1 files changed, 8 insertions, 0 deletions

diff --git a/README.md b/README.md
index 2e5edcb..c297790 100644
--- a/README.md
+++ b/README.md
@@ -107,6 +107,14 @@ handle(Req, State) ->
 terminate(Req, State) ->
     ok.
 ```
+**Note**: versions prior to `0.4.0` used the
+[quoted](https://github.com/klaar/quoted.erl) library instead of the built in
+`cowboy_http:urldecode/2` function. If you want to retain this you must add it
+as a dependency to your application and add the following cowboy_http_protocol
+option:
+
+    {urldecode, {fun quoted:from_url/2, quoted:make([])}}
+
 
 Continue reading to learn how to dispatch rules and handle requests.