net-im/skype4: drop checks for EOL'd versions of FreeBSD
net-im/skype4: drop check for LINUX_V4L2_AVAILABLE, all current FreeBSD versions support it.
net-im/skype4: Stagify and fix pkg-plist
net-im/skype4: Add dependency on desktop-file-utils, found by 'make check-qa'
net-im/skype4: remove unused VIDEO entry in SUB_LIST
net-im/skype4: Use option helpers.
net-im/skype4: Simplify inclusions.
Merge pull request #3 from rene0/master

modernize net-im/skype4