net/remmina: Update to 1.2.0-rcgit.16

• Add extra patch for FreeBSD<10.3-RELEASE as utimensat isn't available
• Take maintainership
• Modernise port: use new options helpers and USES=pathfix
• Correct LICENSE and add LICENSE_FILE
• Add new dependencies detected by qa script
• Add new option for enabling user survey (off by default)
• Also update net/remmina-plugins and net/remmina-plugin-*
• Remove net/remmina-plugin-i18n - translations were removed upstream

Approved by: adamw (mentor)
Differential Revision: D8436