fix a couple of typos; schemacheck was duplicated

doc/man/man5/slapd.conf.5

@@ -507,9 +507,6 @@ Note that the
 factor is measure of security provided by the underlying transport,
 e.g. ldapi:// (and eventually IPSEC).  It is not normally used.
 .TP
-.B schemacheck { on | off }
-Turn schema checking on or off. The default is on.
-.TP
 .B sizelimit <integer> 
 .TP
 .B sizelimit size[.{soft|hard|unchecked}]=<integer>
@@ -539,7 +536,7 @@ The default is 32.
 .TP
 .B timelimit <integer>
 .TP
-.B sizelimit size[.{soft|hard}]=<integer>
+.B timelimit time[.{soft|hard}]=<integer>
 Specify the maximum number of seconds (in real time)
 .B slapd
 will spend answering a search request.  The default time limit is 3600.