Remove some optional parameters that are unnecessary in context.

Doc/mac/libmacdnr.tex

@@ -91,15 +91,15 @@ The canonical name of the host that was queried.
 \end{memberdesc}
 
 \begin{memberdesc}[dnr result]{ip0}
-\memberline[dnr result]{ip1}
-\memberline[dnr result]{ip2}
-\memberline[dnr result]{ip3}
+\memberline{ip1}
+\memberline{ip2}
+\memberline{ip3}
 At most four integer IP addresses for this host.  Unused entries are
 zero.  Valid only for address queries.
 \end{memberdesc}
 
 \begin{memberdesc}[dnr result]{cpuType}
-\memberline[dnr result]{osType}
+\memberline{osType}
 Textual strings giving the machine type an OS name.  Valid for ``hinfo''
 queries.
 \end{memberdesc}