All the above being done on HEAD, it can be convenient to cascade the upgrade on branches. Usual tiki merges occur usually from branch to HEAD, now it's the contrary for such third party libs.
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$ cvs co -r BRANCH-1-9 _adodb
$ cd _adodb
$ cvs up -jHEAD
Then fix conflicts and commit
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$ grep -r '<<<<<<<' *
# .. hack and fix
$ cvs ci -m'applied tiki former changes to adodb 3.70'