Wrong ACL 'attr=' documentation (ITS#3079)

[h.b.furuseth@usit.uio.no]

Full_Name: Hallvard B Furuseth
Version: 2.1.29
OS: 
URL: 
Submission from: (NULL) (129.240.186.42)
Submitted by: hallvard


2.1.29 slapd.access(5) describes the `attrs' keyword,
but slapd/aclparse.c implements the "attr" keyword.
2.2.8 aclparse.c implements both "attr" and "attrs"; I suggest
that's copied to RE21.