add cvs server link

man/man1/cvs.1

@@ -41,6 +41,9 @@ cvs \- introduction using plan9port CVS repository
 [
 .I path ...
 ]
+.PP
+.B web
+.B http://cvs.pdos.lcs.mit.edu/cvs/plan9/
 .SH DESCRIPTION
 The master source tree for Plan 9 from User Space is maintained
 using the source control system CVS
@@ -174,6 +177,9 @@ You will need to run the
 command first to create your
 .B .cvspass
 file.
+.PP
+The CVS tree can be inspected on the web at
+.HR http://cvs.pdos.lcs.mit.edu/cvs/plan9/ "" .
 .SH EXAMPLES
 Incorporate any changes made to the CVS tree since
 the last check out or update:
@@ -219,7 +225,9 @@ list of files and wildcards to exclude from CVS operations in this directory
 .SH SEE ALSO
 Unix's
 \fIcvs\fR(1),
-.HR http://www.cvshome.org
+.HR http://www.cvshome.org/
+.PP
+.HR http://cvs.pdos.lcs.mit.edu/cvs/plan9/
 .SH BUGS
 The CVS server is a read-only public copy of a private tree.
 The dates on versions reflect the date the changes were made in the