FreeBSD/src 4262dbcshare/man/man4 Makefile uath.4

wifi manuals: Mlink + document description consistency

Interfaces all have an mlink to if_$foo. Add these for the missing ones
and remove an incorrect one from rtwn_pci. Wireless network drivers are
all accessible via `apropos -s4 "wireless network driver", except two
which are "wireless network device". I actually prefer the latter, but
make them all consistent upon the more common parlance. Tag SPDX on one
of the files I touched, while here.

MFC after:              3 days
Reviewed by:            bz, carlavilla, mhorne
Approved by:            carlavilla, mhorne (mentors)
Differential Revision:  https://reviews.freebsd.org/D49063
DeltaFile
+3-1share/man/man4/Makefile
+3-1share/man/man4/uath.4
+1-1share/man/man4/upgt.4
+7-33 files

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