[GRASS5] g.html2man crashes

Hi,

may I ask a PERL expert to fix:

sh src/scripts/contrib/g.html2man/g.html2man
/bin/sh: -- #perl, to stop looping: unrecognized option
Usage: /bin/sh [GNU long option] [option] ...
        /bin/sh [GNU long option] [option] script-file ...
GNU long options:
[...]

This script is called under certain circumstances
from html/Gmakefile

Thanks,

Markus