- GNATS removal

Approved by:	bcr
Differential Revision:	https://reviews.freebsd.org/D660


git-svn-id: svn+ssh://svn.freebsd.org/doc/head@45516 c2e8774f-c49f-e111-b436-862b2bbc8956
- add information about how boot loader searches for files

PR:	187613
Submitted by:	fernando.apesteguia@gmail.com
Approved by:	bcr
Differential Review:	https://reviews.freebsd.org/D660


git-svn-id: svn+ssh://svn.freebsd.org/doc/head@45517 c2e8774f-c49f-e111-b436-862b2bbc8956