parser: add support for icecast SOURCE method

Fixes: https://github.com/nodejs/http-parser/issues/405
PR-URL: https://github.com/nodejs/http-parser/pull/407
Reviewed-By: Fedor Indutny <fedor@indutny.com>

http_parser.c

@@ -942,7 +942,7 @@ reexecute:
             /* or PROPFIND|PROPPATCH|PUT|PATCH|PURGE */
             break;
           case 'R': parser->method = HTTP_REPORT; /* or REBIND */ break;
-          case 'S': parser->method = HTTP_SUBSCRIBE; /* or SEARCH */ break;
+          case 'S': parser->method = HTTP_SUBSCRIBE; /* or SEARCH, SOURCE */ break;
           case 'T': parser->method = HTTP_TRACE; break;
           case 'U': parser->method = HTTP_UNLOCK; /* or UNSUBSCRIBE, UNBIND, UNLINK */ break;
           default:
@@ -988,6 +988,7 @@ reexecute:
             XX(MKCOL,     2, 'A', MKACTIVITY)
             XX(MKCOL,     3, 'A', MKCALENDAR)
             XX(SUBSCRIBE, 1, 'E', SEARCH)
+            XX(SUBSCRIBE, 1, 'O', SOURCE)
             XX(REPORT,    2, 'B', REBIND)
             XX(PROPFIND,  4, 'P', PROPPATCH)
             XX(LOCK,      1, 'I', LINK)

http_parser.h

@@ -201,6 +201,8 @@ enum http_status
   /* RFC-2068, section 19.6.1.2 */  \
   XX(31, LINK,        LINK)         \
   XX(32, UNLINK,      UNLINK)       \
+  /* icecast */                     \
+  XX(33, SOURCE,      SOURCE)       \
 
 enum http_method
   {

test.c

@@ -1154,6 +1154,26 @@ const struct message requests[] =
   ,.body= ""
   }
 
+#define SOURCE_REQUEST 42
+, {.name = "source request"
+  ,.type= HTTP_REQUEST
+  ,.raw= "SOURCE /music/sweet/music HTTP/1.1\r\n"
+         "Host: example.com\r\n"
+         "\r\n"
+  ,.should_keep_alive= TRUE
+  ,.message_complete_on_eof= FALSE
+  ,.http_major= 1
+  ,.http_minor= 1
+  ,.method= HTTP_SOURCE
+  ,.request_path= "/music/sweet/music"
+  ,.request_url= "/music/sweet/music"
+  ,.query_string= ""
+  ,.fragment= ""
+  ,.num_headers= 1
+  ,.headers= { { "Host", "example.com" } }
+  ,.body= ""
+  }
+
 , {.name= NULL } /* sentinel */
 };