docs: document bitbucket servers, codereview(1)

http://codereview.appspot.com/98068

man/man1/hg.1

@@ -4,7 +4,7 @@ hg \- introduction to using plan9port Mercurial repository
 .SH SYNOPSIS
 .B hg
 .B clone
-.B http://hg.pdos.csail.mit.edu/hg/plan9
+.B http://code.swtch.com/plan9port
 .B plan9
 .PP
 .B hg
@@ -28,7 +28,7 @@ hg \- introduction to using plan9port Mercurial repository
 .B view
 .PP
 .B web
-.B http://hg.pdos.csail.mit.edu/hg/plan9/
+.B http://code.swtch.com/plan9port
 .SH DESCRIPTION
 The master source tree for Plan 9 from User Space is maintained
 using the source control system Mercurial
@@ -92,7 +92,7 @@ the local repository at the address
 starts an interactive history viewer.
 .PP
 The Mercurial tree can be inspected on the web at
-.HR http://hg.pdos.csail.mit.edu/hg/plan9/ "" .
+.HR http://code.swtch.com/plan9port/ "" .
 .SH FILES
 .TP
 .B \*9/.hg
@@ -101,13 +101,14 @@ directory containing Mercurial local repository
 .B .hgignore
 list of files and wildcards to exclude from Mercurial operations
 .SH SEE ALSO
+.IR codereview (1),
 .IR cvs (1)
 .PP
 Unix's
 \fIhg\fR(1),
 .HR http://www.selenic.com/mercurial/wiki/
 .PP
-.HR http://hg.pdos.csail.mit.edu/hg/plan9/
+.HR http://code.swtch.com/plan9port/
 .SH BUGS
 The use of Mercurial for accessing Plan 9 from User Space
 should be considered experimental.