New port: net/pecl-xmlrpc

These functions can be used to write XML-RPC servers and clients.
You can find more information about XML-RPC at http://www.xmlrpc.com/,
and more documentation on this extension and its functions at
http://xmlrpc-epi.sourceforge.net/.

WWW: https://pecl.php.net/package/xmlrpc

PR: 254285, 250648
Submitted by: Derek Schrock <dereks@lifeofadishwasher.com>
Reviewed by: tz, ale
Approved by: tz, ale
Differential Revision: https://reviews.freebsd.org/D29264