K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2018-09-26T21:27:08.033568Z
K 7
svn:log
V 318
When doing lm_add(), check for duplicates.

This is useful when lm_find() moves the match to the global mapping,
since lm_find() could be called with a same path more than once.

Reported and tested by:	Andreas Longwitz <longwitz@incore.de>
Sponsored by:	The FreeBSD Foundation
Approved by:	re (gjb)
MFC after:	1 week

END