Log Message:
Update to 1.10.9:

Many back-end fixes have been implemented: argument handling
(quoting), man improvements, error/warning classes, and many more.

Initial tbl functionality (see the "TS", "TE", and \ 
"T&" macros in
the roff manual) has been merged from tbl.bsd.lv. Output is still
minimal, especially for -Thtml and -Txhtml, but manages to at least
display data. This means that mandoc now has built-in support for
two troff preprocessors via libroff: soelim and tbl.