Fix minor formatting problem (missing .TP) with dbcachenowsync description.

doc/man/man5/slapd.conf.5

@@ -266,6 +266,7 @@ by the LDBM backend database instance.  The default is 1000 entries.
 Specify the size in bytes of the in-memory cache associated 
 with each open index file. If not supported by the underlying database 
 method, this option is ignored without comment.  The default is 100000 bytes.
+.TP
 .B dbcachenowsync
 Specify that database writes should not be immediately synchronized
 with in memory changes.  Enabling this option may improving performance