11622 clean up rarer mandoc lint warnings

*** 232,244 ****
         ypset(1M), ypstart(1M), ypstop(1M), ypxfr(1M), ndbm(3C), ypclnt(3NSL),
         libnsl(3LIB), NISLDAPmapping(4), securenets(4), ypfiles(4), ypserv(4),
         attributes(5), smf(5)
  
  
- 
- 
- 
  NOTES
         ypserv supports multiple domains. The ypserv process determines the
         domains it serves by looking for directories of the same name in the
         directory /var/yp. It replies to all broadcasts requesting yp service
         for that domain.
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