ports/155838: Update port: textproc/txt2man to 1.5.6

[miwi at FreeBSD.org]

Synopsis: Update port: textproc/txt2man to 1.5.6

Responsible-Changed-From-To: freebsd-ports-bugs->miwi
Responsible-Changed-By: miwi
Responsible-Changed-When: Tue Mar 22 23:15:55 UTC 2011
Responsible-Changed-Why: 
I'll take it.

http://www.freebsd.org/cgi/query-pr.cgi?pr=155838