to use constants instead of local variables. Also, change the permissions
so that they are stricter in general, and work better under suexec.
This also fixes the problem that dependency graphs didn't work under
suexec, and adds a "web" directory by default to Extensions created with
extension/create.pl.
r=mkanat, a=mkanat (module owner)
git-svn-id: svn://10.0.0.236/trunk@260580 18797224-902f-48f8-a5cc-f745e15eee43
741d40d875