Git Master Freeze for 4.11

[Chris Johns]

Hello,

I would like to propose we freeze the master branch in git and only
regressions are committed. Joel is intending to branch on Monday his
time if everything is ok but we need time to test before the branch is made.

If there are any objections please raise them otherwise I will assume
master is frozen.

Lets assume this is the case for the rtems, rtems-source-builder and
rtems-tools repos.

Thanks
Chris