[Python-Dev] [Python-checkins] hooks: Fix checkbranch hook

[Éric Araujo]

> Then we will have to fix the hook each time we want to add a new
> legitimate branch.
The alternative is to edit the hook each time we want to remove a former
legitimate branch, plus have another hook to refuse new named branches.

>  I have no preference really.
Looks like a ±0 to me :)

Regards