To help with flavored ports, helpers are available.  In these, replace <*>
  with the flavor name.

  *_PKGNAMEPREFIX *_PKGNAMESUFFIX *_PLIST *_DESCR will overwrite the variable.

  *_CONFLICTS *_CONFLICTS_BUILD *_CONFLICTS_INSTALL *_PKG_DEPENDS
  *_EXTRACT_DEPENDS *_PATCH_DEPENDS *_FETCH_DEPENDS *_BUILD_DEPENDS
  *_LIB_DEPENDS *_RUN_DEPENDS *_TEST_DEPENDS will append to the variable.

Reviewed by:	portmgr
Sponsored by:	Absolight
Differential Revision:	https://reviews.freebsd.org/D12483