Rob W. W. Hooft's spelling fixes for the Library Reference. I hope
SourceForge doesn't choke on this batch :-)

I'm not entirely sure this is 100% correct. The patch changes an
\index{persistency} to \index{presistence}, and I don't know what \index{}
does. But it seems to do so persi--er, consistently, so I hope it isn't a
problem.
diff --git a/Doc/lib/libnis.tex b/Doc/lib/libnis.tex
index d7060fa..34ca329 100644
--- a/Doc/lib/libnis.tex
+++ b/Doc/lib/libnis.tex
@@ -19,7 +19,7 @@
 Return the match for \var{key} in map \var{mapname}, or raise an
 error (\exception{nis.error}) if there is none.
 Both should be strings, \var{key} is 8-bit clean.
-Return value is an arbitary array of bytes (i.e., may contain \code{NULL}
+Return value is an arbitrary array of bytes (i.e., may contain \code{NULL}
 and other joys).
 
 Note that \var{mapname} is first checked if it is an alias to another name.
@@ -28,7 +28,7 @@
 \begin{funcdesc}{cat}{mapname}
 Return a dictionary mapping \var{key} to \var{value} such that
 \code{match(\var{key}, \var{mapname})==\var{value}}.
-Note that both keys and values of the dictionary are arbitary
+Note that both keys and values of the dictionary are arbitrary
 arrays of bytes.
 
 Note that \var{mapname} is first checked if it is an alias to another name.