Style: unified request method checks.

diff --git a/src/http/modules/ngx_http_chunked_filter_module.c b/src/http/modules/ngx_http_chunked_filter_module.c
index a7dc5bf..0059a98 100644
--- a/src/http/modules/ngx_http_chunked_filter_module.c
+++ b/src/http/modules/ngx_http_chunked_filter_module.c

@@ -64,7 +64,7 @@
         || r->headers_out.status == NGX_HTTP_NO_CONTENT
         || r->headers_out.status < NGX_HTTP_OK
         || r != r->main
-        || (r->method & NGX_HTTP_HEAD))
+        || r->method == NGX_HTTP_HEAD)
     {
         return ngx_http_next_header_filter(r);
     }

diff --git a/src/http/modules/ngx_http_static_module.c b/src/http/modules/ngx_http_static_module.c
index 631eb17..f79c4ae 100644
--- a/src/http/modules/ngx_http_static_module.c
+++ b/src/http/modules/ngx_http_static_module.c

@@ -204,7 +204,7 @@
 
 #endif
 
-    if (r->method & NGX_HTTP_POST) {
+    if (r->method == NGX_HTTP_POST) {
         return NGX_HTTP_NOT_ALLOWED;
     }
 

diff --git a/src/http/modules/ngx_http_stub_status_module.c b/src/http/modules/ngx_http_stub_status_module.c
index dd68358..61199f2 100644
--- a/src/http/modules/ngx_http_stub_status_module.c
+++ b/src/http/modules/ngx_http_stub_status_module.c

@@ -89,7 +89,7 @@
     ngx_chain_t        out;
     ngx_atomic_int_t   ap, hn, ac, rq, rd, wr, wa;
 
-    if (r->method != NGX_HTTP_GET && r->method != NGX_HTTP_HEAD) {
+    if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) {
         return NGX_HTTP_NOT_ALLOWED;
     }
 

diff --git a/src/http/ngx_http_request.c b/src/http/ngx_http_request.c
index ab7c15f..b68a13d 100644
--- a/src/http/ngx_http_request.c
+++ b/src/http/ngx_http_request.c

@@ -1788,7 +1788,7 @@
         }
     }
 
-    if (r->method & NGX_HTTP_TRACE) {
+    if (r->method == NGX_HTTP_TRACE) {
         ngx_log_error(NGX_LOG_INFO, r->connection->log, 0,
                       "client sent TRACE method");
         ngx_http_finalize_request(r, NGX_HTTP_NOT_ALLOWED);

diff --git a/src/http/ngx_http_upstream.c b/src/http/ngx_http_upstream.c
index 8a9fbac..c618ce6 100644
--- a/src/http/ngx_http_upstream.c
+++ b/src/http/ngx_http_upstream.c

@@ -772,7 +772,7 @@
             return rc;
         }
 
-        if ((r->method & NGX_HTTP_HEAD) && u->conf->cache_convert_head) {
+        if (r->method == NGX_HTTP_HEAD && u->conf->cache_convert_head) {
             u->method = ngx_http_core_get_method;
         }