version control policy

[Petr Ovtchenkov]

Good day!

I want to understand aspects in version control policy.

- What the principles of branches? I.e. what the relation between,
  say, master, binutils-2_28-branch and gdb-7.12-branch?

  What the relation between binutils-2_28-branch and published
  binutils 2.28, gdb-7.12-branch and published GDB 7.12.1?

- Is bot's commits (like 40d57b1947) really useful?

Thanks,

   - ptr