net/libvncserver: Update to 0.9.10

• Change from SF to GITHUB, as old WWW redirects there
• Add USES=autoreconf pkgconfig as distfile no longer contains configure
• Remove CONFIGURE_ARGS=--without-x as it is ignored (no longer supported)
• Convert OPENSSL and GNUTLS to OPTIONS_SINGLE, as build fails with neither
• Add GNUTLS_IMPLIES=GCRYPT as build fails with GNUTLS but not GCRYPT
• Add LIB_DEPENDS=libgpg-error.so as reported by new stage-qa script
• Tidy up patches for new release, ensure pathfix applies to Makefile.am

Reported by: dutchman01@quicknet.nl
Reviewed by: adamw (mentor)
Approved by: mat (mentor)
Relnotes: https://github.com/LibVNC/libvncserver/releases/tag/LibVNCServer-0.9.10
Differential Revision: https://reviews.freebsd.org/D6946