[PATCH] Fix for Issue #3781 repo prefix rules in authz section is checked case sensitively for commit

Hi All,

Authz section names(and paths too) are parsed/loaded in a case
insensitive way.

So they need to be compared in a case-insensitive way.

Following functions do authz,

1. libsvn_repos/authz.c:authz_get_path_access()
2. libsvn_repos/authz.c:authz_get_any_access() is called when the "path"
is NULL (for MKACTIVITY, DELETE).

'1' is leaving it to svn_config_enumerate2() to handle case
(in)sensitiveness.
'2' is explicitly comparing each config item in a case sensitive way.

My patch is just fixing the '2' to check it in a case insensitive way.

Regards,
Arwin Arni