DragonFlyBSD/src 82391b5etc man.conf, usr.bin/man man.c man.conf.5

Remove the unhooked/-used man(1) command from usr.bin.

It was added in 2013 but not continued on. I will soon replace the man(1)
we use (in gnu/usr.bin) with FreeBSD's.
DeltaFile
+0-1,067usr.bin/man/man.c
+0-286usr.bin/man/man.conf.5
+0-257usr.bin/man/manconf.c
+0-241usr.bin/man/man.1
+0-60usr.bin/man/manconf.h
+0-57etc/man.conf
+0-39usr.bin/man/pathnames.h
+0-8usr.bin/man/Makefile
+0-2,0158 files

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