Bug#831063: sbuild --help broken

[Uwe Kleine-König]

Package: sbuild
Version: 0.69.0-2
Severity: normal

$ sbuild --help
Can't exec "'man": No such file or directory at /usr/share/perl5/Sbuild.pm line 
253.

I'm not a perl guru, but I guess this one is easy to fix.

Best regards
Uwe