sslutil: remove conditional cipher code needed for Python 2.6
We dropped support for Python 2.6. So this code to work around a
missing feature on 2.6 is no longer necessary.
Phil Cohen <phillco@fb.com> [Thu, 11 May 2017 18:38:43 -0700] rev 32286
merge: use repo.wvfs.setflags() instead of util.setflags()
Most merge.py code goes through the vfs instead of maniulating
files directly, so let's do the same here.