Pull up following revision(s) (requested by joerg in ticket #4):
usr.sbin/makemandb/apropos.c: revision 1.5
external/bsd/mdocml/dist/read.c: revision 1.6
external/bsd/mdocml/dist/mandoc.h: revision 1.2
usr.sbin/makemandb/makemandb.c: revision 1.3
usr.sbin/makemandb/makemandb.c: revision 1.4
usr.sbin/makemandb/makemandb.c: revision 1.5
usr.sbin/makemandb/Makefile: revision 1.2
etc/man.conf: revision 1.30
usr.sbin/makemandb/apropos.1: revision 1.3
external/bsd/mdocml/Makefile.inc: revision 1.15
Be a bit more friendly to man pages using the roff .so command by
changing the current directory to the parent of the man -p entry, e.g.
/usr/share/man for /usr/share/man1.
Also handle hyphen replacement if it was used as plain input and no
backslash sequence was used at all in the line.
Add support for apropos -s like in the old apropos. Fix capitalisation.
Add note about optional quotation. From Abhinav Upadhyay.
Merge mandoc.h r1.99 and read.c 1.28 from upstream:
Add mparse_readmem, which allows application to run the parser directly
from memory, e.g. after de-compressing a document.
Add support for compressed man pages in all the usual formats.
Use mmap when dealing with plain files.
Add entries for bzip2 and xz.