Anonymous CVS access is available again, but on a different system
than before.  In addition to the anonymous CVS repository, there is
also

    <http://cvs.apache.org/viewcvs.cgi/>

and an rsync server at cvs.apache.org.  Try

    rsync cvs.apache.org::

to get a listing of the modules.

    rsync -avz cvs.apache.org::module-name local-directory-name

to grab or update a local copy of the "module-name" sources.

======================================================================
                          HOW TO USE ANONCVS
======================================================================

Developers with commit access to the Apache source tree normally
use CVS to keep their local copies of the source tree up to date
automatically.  This is a very useful ability that also allows
for getting change history of files, diffs between arbitrary 
versions, etc.  This is also the method used to commit changes 
to the source tree.

For those who do not have commit access to the source tree, anoncvs
offers an alternative way to do most of this using a copy of the
CVS repository.  The big difference is, of course, that you can't
commit changes using anoncvs.

The first step in using anoncvs is setting your CVSROOT environment 
variable.  This tells CVS to what server it should connect.  There
are currently two, and the only available method to access these
anoncvs servers is pserver; you need a reasonably recent CVS client
to use it.  An example of setting it from a Bourne shell:

  user@host:~$ CVSROOT=:pserver:anoncvs@cvs.apache.org:/home/cvspublic
  user@host:~$ export CVSROOT

It is very important that you do not put a trailing "/" on the value
of CVSROOT.

The two anoncvs servers currently available are:

  :pserver:anoncvs@cvs.apache.org:/home/cvspublic

and

  :pserver:anoncvs@CVS.Sourcery.Org:/cvs/apache

Choose one of these values for your setting of CVSROOT.
Once you have set your CVSROOT, you need to log in:

  user@host:~$ cvs login
  (Logging in to anoncvs@cvs.apache.org:/home/cvspublic)
  CVS password: 

The password is "anoncvs" (without the quotation marks) for
both servers.

To check out the current development tree:

  user@host:~$ cvs checkout httpd-2.0
  cvs server: Updating httpd-2.0
  U httpd-2.0/ABOUT_APACHE
  U httpd-2.0/Announcement
  U httpd-2.0/Apache.dsp
  [...]
  U httpd-2.0/test/test_select.c
  U httpd-2.0/test/time-sem.c
  U httpd-2.0/test/zb.c
  user@host:~$ ls httpd-2.0
  ABOUT_APACHE            InstallBin.dsp          emacs-style
  Announcement            Makefile.in             hints.m4
  Apache.dsp              Makefile.win            include
  Apache.dsw              STATUS                  modules
  ApacheCore.def          acinclude.m4            os
  ApacheCore.dsp          build                   server
  ApacheCoreDll.dsp       buildconf               srclib
  CHANGES                 configure.in            support
  CVS                     docs                    test
  user@host:~$ cd httpd-2.0/srclib
  user@host:~/httpd-2.0/srclib$ cvs checkout apr
  U apr/APRDesign
  U apr/APRVARS.in
  U apr/Makefile.in
  [...]
  U apr/user/unix/.cvsignore
  U apr/user/unix/Makefile.in
  U apr/user/unix/homedir.c
  user@host:~/httpd-2.0/srclib$ cvs checkout apr-util
  U apr-util/.cvsignore
  U apr-util/Makefile.in
  U apr-util/STATUS
  [...]
  U apr-util/test/.cvsignore
  U apr-util/test/Makefile.in
  U apr-util/test/testdbm.c


To checkout the stable release tree (version 1.3):

  user@host:~$ cvs checkout apache-1.3

After 1.3a1, there was a source tree reorganization which resulted
in the tree being split into apache-1.2 and apache-1.3.  apache-1.2
is everything from before the reorganization, apache-1.3 is from
after.  apache-1.3 still retains the change histories of the files,
however since they are in different locations you can not build an
apache-1.3 tree from before the reorganization.  The current development
tree (httpd-2.0) was largely restructured and repopulated, and
the layout is still in a bit of flux.

To update your local tree to the latest version:

  user@host:~$ cvs update -dP apache-1.3

or

  user@host:~/apache-1.3/$ cvs update -dP .

etc.  

  P core/buff.c
  P core/conf.h
  RCS file: /home/cvs/apache-1.3/src/core/http_core.c,v
  retrieving revision 1.109
  retrieving revision 1.110
  Merging differences between 1.109 and 1.110 into http_core.c
  M core/http_core.c

The P means that the local copy was patched to update it to the 
current version.  The M means that your local copy was modified,
but that the changes were merged into your copy successfully.  If
you see a C that means that there was a conflict in merging 
the changes and that you need to review the file manually (hint: 
search for >>>> in the file) to merge the changes.

To obtain a diff of changes between your checked out copy and 
the source tree at the time you checked it out:

  user@host:~$ cvs diff -u apache-1.3

To obtain a diff against the current source tree, be sure to
do an update before the diff.

The idea of having an anoncvs server is to make it much easier
for people interested in doing development to have access to the
CVS tree so they can submit patches against the current source
tree and can keep their patched version up to date without 
having to manually merge their patches all the time.