unicorn 5.5.1

unicorn 5.5.1

This release fixes and works around issues from v5.5.0 (2019-03-04)

Stephen Demjanenko worked around a pipe resource accounting bug
present in old Linux kernels.  Linux 3.x users from 3.16.57 and
on are unaffected.  Linux 4.x users from 4.9 and on are
unaffected.

https://bogomips.org/unicorn-public/1556922018-24096-1-git-send-email-sdemjanenko@gmail.com/

Stan Pitucha reported a bug with the old `unicorn_rails' wrapper
(intended for Rails 2.x users) which was promptly fixed by
Jeremy Evans:

https://bogomips.org/unicorn-public/CAJ2_uEPifcv_ux4sX=t0C4zHTHGhqVfcLcSB2kTU3Rb_6pQ3nw@mail.gmail.com/

There's also some doc updates to warn users off `unicorn_rails';
the homepage is now energy-efficient for OLEDs and CRTs;
and I'm no longer advertising mailing list subscriptions
(because I hate centralization and mail archives are the priority)

Eric Wong (3):
      doc: unicorn_rails: clarify that it is intended for rails <= 2.x
      doc: stop advertising mailing list subscription
      doc: switch homepage to dark216

Jeremy Evans (1):
      unicorn_rails: fix regression with Rails >= 3.x in app build

Stephen Demjanenko (1):
      Rescue failed pipe resizes due to permissions