Fixed handling of UNIX-domain sockets.

When evaluating $local_port, $server_port, and $server_addr,
UNIX-domain sockets were mistakenly interpreted as IPv4 sockets.

src/core/ngx_connection.c

diff --git a/src/core/ngx_connection.c b/src/core/ngx_connection.c
index 4d73eb3..57e2691 100644
--- a/src/core/ngx_connection.c
+++ b/src/core/ngx_connection.c
@@ -1095,6 +1095,12 @@
         break;
 #endif
 
+#if (NGX_HAVE_UNIX_DOMAIN)
+    case AF_UNIX:
+        addr = 1;
+        break;
+#endif
+
     default: /* AF_INET */
         sin = (struct sockaddr_in *) c->local_sockaddr;
         addr = sin->sin_addr.s_addr;

src/http/ngx_http_variables.c

diff --git a/src/http/ngx_http_variables.c b/src/http/ngx_http_variables.c
index e49d202..8b86d5a 100644
--- a/src/http/ngx_http_variables.c
+++ b/src/http/ngx_http_variables.c
@@ -1185,6 +1185,12 @@
         break;
 #endif
 
+#if (NGX_HAVE_UNIX_DOMAIN)
+    case AF_UNIX:
+        port = 0;
+        break;
+#endif
+
     default: /* AF_INET */
         sin = (struct sockaddr_in *) r->connection->sockaddr;
         port = ntohs(sin->sin_port);
@@ -1263,6 +1269,12 @@
         break;
 #endif
 
+#if (NGX_HAVE_UNIX_DOMAIN)
+    case AF_UNIX:
+        port = 0;
+        break;
+#endif
+
     default: /* AF_INET */
         sin = (struct sockaddr_in *) r->connection->local_sockaddr;
         port = ntohs(sin->sin_port);