vfs_catia: factor out mapping functions
This moves the core mapping functions to a seperate file and makes them
global.
string_replace_init_map() is called to parse a mapping in string and
produce a mapping object that can then be passed to
string_replace_allocate() to do the actual mapping of a string.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=13076
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
(backported from commit
f8bd63e19c8b1c063dd6f41b405d6864a9b546ff)