Closing PRs for 3.4.1

[Giovanni Bajo]

Mark Mitchell wrote:

> Please do not target any more regressions at 3.4.1; instead, please
> target them at 3.4.2.  If you feel a new PR is so important as to be
> essential for 3.4.1, please put me in the CC list, and specifically
> ask me to retarget for 3.4.1.

OK. But please, remember that there are also 3.4 regressions which might be
currently target at 3.3.4/3.3.5 or 3.5.0 (being also regressions on the 3_3
branch and the trunk).

Giovanni Bajo