Fix more compiler warnings.
Fix more compiler warnings.

* test/MockHTTPinC/MockHTTP.c
  (serializeArrayOfIovecs, serializeHeaders, serializeRawBody,
   serializeRequest, serializeRequestMatch): Make them static functions to
    silence compiler complaining about lack of declartion (technically
    serializeArrayofIovecs had a forward declaration so it produced no warning
    but it's not used anywhere else anyway).

jandre/serf,jandre/serf,jandre/serf,jandre/serf