K 10
svn:author
V 6
emaste
K 8
svn:date
V 27
2018-11-12T20:44:22.472097Z
K 7
svn:log
V 220
retire LINKER_FEATURES filter flag

And build libdl unconditionally.  All supported FreeBSD linkers accept
-F / --filter so there is no need to test for support.

Discussed with:	kib
Sponsored by:	The FreeBSD Foundation

END