[Groff] Correction of access permissions in groff source

[Bernd Warken]

The groff source in the tar file has strange access permissions.   The command  
`ls -l` reveals that most files have the x-attribute (executable mode) set and 
most files and directories use the group s-attribute.  The following shell 
script fixes this.

cd <groff-source-top-dir>
chmod 755 "$(find -type d)"
chmod 644 "$(find -type f)"
chmod 755 "$(find -type f -name '*sh')"
chmod 755 configure

Bernd Warken

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