[Devel] name for branch 1.2.x

[Daniel-Constantin Mierla]

Hello,

so far, when a new major release a new branch was created with the first 
version in that branch:

rel_1_0_0 - was for 1.0.x
rel_1_1_0 - was for 1.1.x

Some complained that it is not suggestive when minor release in the 
branch was done, like 1.0.1 or 1.1.1. So, let's try to find a way more 
convenient. So we will have release a.b.c, where c can be incremented 
several time, being like a patch update release for a.b.0.

Proposed options:
1) a_b_0 - stick to current module
2) a_b_x - use x to signal that it is a changing number for same major 
release
3) a_b - ignore patch release number

Other suggestions are welcome. Please feedback as soon as possible. The 
branch will be created in few hours.

Cheers,
Daniel