Question about differences between cvs-1.12.13 and cvs-1.11.23

Hi all,

I'm working on integrating cvs-1.11.23 into OpenSolaris, and at the 
stage of checking
interfaces I've found some differences between versions 1.12.13 and 
1.11.23. Could someone please tell me
whether the following is true or not:

ENVIRONMENT VARIABLES:
--------------------------------------------------
CVSREADONLYFS,  CVS_PROXYPORT, CVS_LOCAL_BRANCH_NUM, CVS_PID - all of 
these are present in 1.12.13, but NOT in 1.11.23
CVS_SSH - is present in 1.11.23, but NOT in 1.12.13

COMMANDS:
-----------------------
ls, rls - are present in 1.12.13, but NOT in 1.11.23
(Note: I see "rls" mentioned here 
http://cvs.savannah.gnu.org/viewvc/ccvs/NEWS?view=markup&root=cvs&revision=1.116.2.152 

in the "Changes from 1.11.17 to 1.11.18" section, but there's no 
description of the command in the 1.11.23 manual, also trying to run 
'cvs rls' gives me the "Unknown command: `rls'" warning.)

Any help is  appreciated.
- Denis