* OPT: Define the TZ environment variable at startup if it not defined to
prevent the glibc to stat the '/etc/localtime' file again and again.
* OPT: Cache the last value of System.TimeZone during at most 10 minutes.
[GB.FORM]
* OPT: Implement a directory cache to minimize the number of calls to the
Stat() function.
[GB.SETTINGS]
* BUG: Do not mark the settings file as modified if the stored value is not
really changed.
git-svn-id: svn://localhost/gambas/trunk@6290 867c0c6c-44f3-4631-809d-bfa615b0a4ec
bdbf3ac7d5