Merge pull request #1103 from pagespeed/morlovich-ua-tweak-for-fontservice

Adjust our UA string to fix to make it compatible with fonts.g.c parsing on IE11.
diff --git a/src/ngx_fetch.cc b/src/ngx_fetch.cc
index 33172d7..79d3343 100644
--- a/src/ngx_fetch.cc
+++ b/src/ngx_fetch.cc
@@ -938,8 +938,8 @@
     user_agent += "NgxNativeFetcher";
   }
   GoogleString version = StrCat(
-      " ", kModPagespeedSubrequestUserAgent,
-      "/" MOD_PAGESPEED_VERSION_STRING "-" LASTCHANGE_STRING);
+      " (", kModPagespeedSubrequestUserAgent,
+      "/" MOD_PAGESPEED_VERSION_STRING "-" LASTCHANGE_STRING ")");
   if (!StringPiece(user_agent).ends_with(version)) {
     user_agent += version;
   }