allow "http://" in auth_http URL
diff --git a/src/mail/ngx_mail_auth_http_module.c b/src/mail/ngx_mail_auth_http_module.c
index 2cb0841..c7484c4 100644
--- a/src/mail/ngx_mail_auth_http_module.c
+++ b/src/mail/ngx_mail_auth_http_module.c
@@ -1383,6 +1383,11 @@
     u.uri_part = 1;
     u.one_addr = 1;
 
+    if (ngx_strncmp(u.url.data, "http://", 7) == 0) {
+        u.url.len -= 7;
+        u.url.data += 7;
+    }
+
     if (ngx_parse_url(cf, &u) != NGX_OK) {
         if (u.err) {
             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,