Hmm, Apple didn't include those items in my new MBP (OSX 10.6.3):
ls /usr/local/share /usr/share/mysql /usr/share/wikid
ls: /usr/local/share: No such file or directory
ls: /usr/share/mysql: No such file or directory
ls: /usr/share/wikid: No such file or directory
Nor is any folder in /bin /sbin or /usr inaccessible (i.e., nothing to necessitate
sudo when searching).
At any rate, it seems you have found some
empty files there.
(...regardless where they came from)
EDIT:
Btw, i just confirmed that —if we can believe the contents of the Essentials bom file —then it seems that those "groff locale" doodads
are indeed empty when installed.
E.g.:
lsbom -p MUGsf /var/db/receipts/com.apple.pkg.Essentials.bom |grep '/mm/locale'
-rw-r--r--    root wheel    0   ./usr/share/groff/1.19.2/tmac/mm/locale
