Fix bug 6878 - Cannot change ACL's inherit flag.
Based on a patch submitted by Tsukasa Hamano <hamano@osstech.co.jp>,
this is a change in the POSIX ACL mapping to deal with the lossy
mapping for directory ACE entries:
We have a lossy mapping: directory ACE entries
CREATOR_OWNER ------\
(map to) +---> SMB_ACL_USER_OBJ
owning sid ------/
CREATOR_GROUP ------\
(map to) +---> SMB_ACL_GROUP_OBJ
primary group sid --/
on set. And on read of a directory ACL
SMB_ACL_USER_OBJ ----> CREATOR_OWNER
SMB_ACL_GROUP_OBJ ---> CREATOR_GROUP.
Deal with this on set by duplicating
owning sid and primary group sid ACE
entries into the directory ACL.
Jeremy.
(cherry picked from commit
8995d3d813978a00b50f33943c60784ddfe308bf)