ITS#9638 - Fix tmpdir information for ldapsearch

Correctly document the compiled in default for the temporary directory used by the ldapsearch utility as well as the environment variables that will override the default.

doc/man/man1/ldapsearch.1

@@ -143,11 +143,13 @@ files.
 .TP
 .BI \-T \ path
 Write temporary files to directory specified by \fIpath\fP (default:
-\fB/var/tmp/\fP)
+\fBsystem default tmp directory\fP). The environment variables \fBTMPDIR\fP,
+\fBTMP\fP, or \fBTEMP\fP will override the default path.
 .TP
 .BI \-F \ prefix
 URL prefix for temporary files.  Default is \fBfile://\fIpath\fP where
-\fIpath\fP is \fB/var/tmp/\fP or specified with \fB\-T\fP.
+\fIpath\fP is the \fBsystem default tmp directory\fP or the value specified
+with \fB\-T\fP.
 .TP
 .B \-A
 Retrieve attributes only (no values).  This is useful when you just want to