Connected beard

BUR #57421 is pending approval.

create implication connected_beard -> mustache

The wiki states it's a beard that blends into a mustache, but currently it implies only the beard part

mustache_stubble connected_beard and connected_beard -mustache have a lot of examples of

• mustache stubble, which does not imply mustache
• a beard connecting to the sideburns, and not to the mustache