fix case when URL has no port, but has ":" in URI part,
the bug has been introduced in r2204

src/core/ngx_inet.c

diff --git a/src/core/ngx_inet.c b/src/core/ngx_inet.c
index 6568cec..e976c4c 100644
--- a/src/core/ngx_inet.c
+++ b/src/core/ngx_inet.c
@@ -264,7 +264,7 @@
 
     port = ngx_strlchr(host, last, ':');
 
-    uri = ngx_strlchr(port ? port : host, last, '/');
+    uri = ngx_strlchr(host, last, '/');
 
     if (uri) {
         if (u->listen || !u->uri_part) {
@@ -276,6 +276,10 @@
         u->uri.data = uri;
 
         last = uri;
+
+        if (uri < port) {
+            port = NULL;
+        } 
     }
 
     if (port) {