Update to use cowboy middleware and cowboy router

[l4u]

Follow the new env tuple standard for cowboy middleware
Fix #62

[erszcz]

Something isn't quite right here. On a clean checkout from this branch I get the following server error when running websockets_SUITE:

(ejabberd@localhost)1> 2013-02-15 13:32:53.770 [error] emulator Error in process <0.679.0> on node 'ejabberd@localhost' with exit value: {{badmatch,false},[{cowboy_router,execute,2,[{file,"src/cowboy_router.erl"},{line,171}]},{cowboy_protocol,execute,4,[{file,"src/cowboy_protocol.erl"},{line,500}]}]}

2013-02-15 13:32:53.829 [error] <0.411.0> Supervisor ranch_conns_sup had child ranch_conns_sup started with {ranch_conns_sup,start_protocol,undefined} at <0.679.0> exit with reason no match of right hand value false in cowboy_router:execute/2 line 171 in context child_terminated
2013-02-15 13:32:57.021 [error] emulator Error in process <0.683.0> on node 'ejabberd@localhost' with exit value: {{badmatch,false},[{cowboy_router,execute,2,[{file,"src/cowboy_router.erl"},{line,171}]},{cowboy_protocol,execute,4,[{file,"src/cowboy_protocol.erl"},{line,500}]}]}

2013-02-15 13:32:57.021 [error] <0.411.0> Supervisor ranch_conns_sup had child ranch_conns_sup started with {ranch_conns_sup,start_protocol,undefined} at <0.683.0> exit with reason no match of right hand value false in cowboy_router:execute/2 line 171 in context child_terminated
2013-02-15 13:33:02.026 [error] emulator Error in process <0.693.0> on node 'ejabberd@localhost' with exit value: {{badmatch,false},[{cowboy_router,execute,2,[{file,"src/cowboy_router.erl"},{line,171}]},{cowboy_protocol,execute,4,[{file,"src/cowboy_protocol.erl"},{line,500}]}]}

2013-02-15 13:33:02.026 [error] <0.411.0> Supervisor ranch_conns_sup had child ranch_conns_sup started with {ranch_conns_sup,start_protocol,undefined} at <0.693.0> exit with reason no match of right hand value false in cowboy_router:execute/2 line 171 in context child_terminated

I can't look into it right now, so am leaving the pull request open till the issue gets resolved.

[l4u]

rebased.
Are the errors coming from make cover_test ?

[erszcz]

Solved as of 7995f94. Fresh clone with ranch and cowboy fetched by rebar passes websockets_SUITE (after a little configuration tweak or using a fix commited in af9cdff).