Bug#1100971: lintian: groff false +ve because tbl preprocessor not enabled for man pages

[Jakub Wilk]

FWIW, Lintian purposefully disables loading preprocessors that weren't 
explicitly requested in the source. See bug #677874 (and #971009).

Adding
    '\" t

at the top of the source should fix the warnings.

--
Jakub Wilk