FIX query string being passed from request to every siteUrl and baseU…

…rl when not stated.

IMP handling proxy server and host naming with port

FIX UriHelper::buildStringFromParts single slash when path and scheme…

… exists but empty authority

FIX UriHelper::buildStringFromParts misses slash when scheme or autho…

…rity is defined

FIX path slashes building uri string

FIX UriHelper buildStringFromParts assign empty scheme causes inconsi…

…stencies

FIX default values in UriHelper::buildStringFromParts

IMP RequestHelperTest with uri port, non standard.

ADD RequestHelper with method stringify (for easier debugging).

ADD UriHelper siteUrl support to X-Forwarded-Host and X-Forwarded-Port
ADD expected testcases for added features

FIX $_SERVER HTTP_X_FORWARDED_PREFIX key