More attr/attrs cleanup

doc/guide/admin/slapdconfig.sdf

@@ -963,7 +963,7 @@ the access directives and the {{EX:by <who>}} clauses.  It also
 shows the use of an attribute selector to grant access to a specific
 attribute and various {{EX:<who>}} selectors.
 
->	access to dn.subtree="dc=example,dc=com" attr=homePhone
+>	access to dn.subtree="dc=example,dc=com" attrs=homePhone
 >		by self write
 >		by dn.children="dc=example,dc=com" search
 >		by peername.regex=IP:10\..+ read
@@ -989,7 +989,7 @@ create a group and allow people to add and remove only
 their own DN from the member attribute, you could accomplish
 it with an access directive like this:
 
->	access to attr=member,entry
+>	access to attrs=member,entry
 > 		by dnattr=member selfwrite
 
 The dnattr {{EX:<who>}} selector says that the access applies to
@@ -1057,7 +1057,7 @@ E: 20.	index uid pres,eq
 E: 21.	index cn,sn,uid pres,eq,approx,sub
 E: 22.	index objectClass eq
 E: 23.	# database access control definitions
-E: 24.	access to attr=userPassword
+E: 24.	access to attrs=userPassword
 E: 25.		by self write
 E: 26.		by anonymous auth
 E: 27.		by dn.base="cn=Admin,dc=example,dc=com" write