Fixed port range checking.

src/core/ngx_inet.c

diff --git a/src/core/ngx_inet.c b/src/core/ngx_inet.c
index ac1ca8b..4baa74a 100644
--- a/src/core/ngx_inet.c
+++ b/src/core/ngx_inet.c
@@ -671,7 +671,7 @@
 
         n = ngx_atoi(port, len);
 
-        if (n < 1 || n > 65536) {
+        if (n < 1 || n > 65535) {
             u->err = "invalid port";
             return NGX_ERROR;
         }
@@ -695,7 +695,7 @@
 
                 if (n != NGX_ERROR) {
 
-                    if (n < 1 || n > 65536) {
+                    if (n < 1 || n > 65535) {
                         u->err = "invalid port";
                         return NGX_ERROR;
                     }
@@ -835,7 +835,7 @@
 
             n = ngx_atoi(port, len);
 
-            if (n < 1 || n > 65536) {
+            if (n < 1 || n > 65535) {
                 u->err = "invalid port";
                 return NGX_ERROR;
             }

src/mail/ngx_mail_auth_http_module.c

diff --git a/src/mail/ngx_mail_auth_http_module.c b/src/mail/ngx_mail_auth_http_module.c
index d54a392..c823326 100644
--- a/src/mail/ngx_mail_auth_http_module.c
+++ b/src/mail/ngx_mail_auth_http_module.c
@@ -783,7 +783,7 @@
             sin->sin_family = AF_INET;
 
             port = ngx_atoi(ctx->port.data, ctx->port.len);
-            if (port == NGX_ERROR || port < 1 || port > 65536) {
+            if (port == NGX_ERROR || port < 1 || port > 65535) {
                 ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
                               "auth http server %V sent invalid server "
                               "port:\"%V\"",