Allowed '-' in method names.

It is used at least by SOAP (M-POST method, defined by RFC 2774) and
by WebDAV versioning (VERSION-CONTROL and BASELINE-CONTROL methods,
defined by RFC 3253).

src/http/ngx_http_parse.c

diff --git a/src/http/ngx_http_parse.c b/src/http/ngx_http_parse.c
index bd6c9c9..9f99473 100644
--- a/src/http/ngx_http_parse.c
+++ b/src/http/ngx_http_parse.c
@@ -149,7 +149,7 @@
                 break;
             }
 
-            if ((ch < 'A' || ch > 'Z') && ch != '_') {
+            if ((ch < 'A' || ch > 'Z') && ch != '_' && ch != '-') {
                 return NGX_HTTP_PARSE_INVALID_METHOD;
             }
 
@@ -270,7 +270,7 @@
                 break;
             }
 
-            if ((ch < 'A' || ch > 'Z') && ch != '_') {
+            if ((ch < 'A' || ch > 'Z') && ch != '_' && ch != '-') {
                 return NGX_HTTP_PARSE_INVALID_METHOD;
             }
 

src/http/v2/ngx_http_v2.c

diff --git a/src/http/v2/ngx_http_v2.c b/src/http/v2/ngx_http_v2.c
index d0cd2ab..235092b 100644
--- a/src/http/v2/ngx_http_v2.c
+++ b/src/http/v2/ngx_http_v2.c
@@ -3178,7 +3178,7 @@
     p = r->method_name.data;
 
     do {
-        if ((*p < 'A' || *p > 'Z') && *p != '_') {
+        if ((*p < 'A' || *p > 'Z') && *p != '_' && *p != '-') {
             ngx_log_error(NGX_LOG_INFO, r->connection->log, 0,
                           "client sent invalid method: \"%V\"",
                           &r->method_name);