If specified, created directories or files
which has name matches with given pattern
will be set with mode
0777(rwxrwxrwx) or 0666(rw-rw-rw-) respectively,
to be sharable among arbitrary users.
When a pattern is specified in non-absolute form, it is regarded as
relative to DGROOT.
By default, directories or files will be created with
mode 0755(rwxr-xr-x) or 0666(rw-rw-rw-),
as modified by UMASK which is 022 typically.
Example:
// make everything sharable SHARE=""
// share cache and log under DGROOT SHARE="cache/*,log/*"
// share directories with older versions SHARE='${CACHEDIR}/*' CACHEDIR='/var/spool/delegate-anybody' SHARE='${VARDIR}/*' VARDIR='/var/spool/delegate'