r23387: 1. This unifies the POSIX ACL detection code:

r23387: 1. This unifies the POSIX ACL detection code:
Linux, FreeBSD and other (which?) ACL implementations
are now checked in the same block instead of in three
separate blocks. This was inspired by Timur Bakeyev
in Bug #4543. Since bugzilla is currently unavailable
this patch is probably slightly different from Timurs
original patch. This should finally fix Bug #4543.

2. The default of the --with-acl-support configure
option is changed to "auto" (which is actually the
same as "yes"). So configure tries to detect acl
support by default. This had been discussed with
Metze and others.

Michael