xmh: Changes to 'master'

[Eric S. Raymond]

 man/xmh.man |  565 ++++++++++++++++++++++++++++++++----------------------------
 1 file changed, 307 insertions(+), 258 deletions(-)

New commits:
commit f0b3169ee8b4ffe7c8152770d1d20c6f5d2f7bcc
Author: Eric S. Raymond <esr at thyrsus.com>
Date:   Wed Jun 19 06:09:50 2013 -0400

    Don't rely on the ability to set tan stops.  Use tables instead.
    
    Also, fix a presentational abuse of the .SS macro.