sysutils/conky: Update to 1.14.0

- Add patch implementing missing function for FreeBSD, already
  proposed upstream: https://github.com/brndnmtthws/conky/pull/1252

- Updated dependencies, upstream changed its documentation build
  method

Old html documentation has been removed, the information is now
encoded in yaml files.

Upstream code does not provide a method to automatically produce
human readable documentation from the yaml files, so I install those
directly in PORTDOCS.