Document the statsd_host option.
Update the THANKS file from the git logs

Update the THANKS file from the git logs
Add the script for the THANKS file
Merge pull request #858 from matrixise/update_thanks

Update the THANKS file from the git logs
Tidy up comments
Merge pull request #859 from tavva/master

Tidy up comments
fix tornado example.

bad command line in example. fix #861
removed useless X-Real-IP header

gunicorn doesn't use it at all.
bump site to 19.1.1
bump pytest version requirement

fix issue when testing with travis-ci.
fix race condition error

When the worker exited the tempfile is not available anymore so we can't
get the last update and calculate the dynamic timeout introduced in
d76bab4d716fed3f965fbde4ba1a1bba975f03d1 .

This changes fix it by catching the IO error.

fix #863
Merge pull request #864 from collinanderson/patch-1

remove useless X-Real-IP header
Fix logging settings link in deploy docs
arbiter: reopen log files first then signal workers

Workers may run under different uid/gid and don't have permission
to create log files. After master opens log files and makes them
rw-able when default umask is used, workers will be able to open
them upon receiving USR1.
Fix supervisor.conf example
Merge pull request #870 from zatan/supervisor-update

Fix supervisor.conf example
Merge pull request #869 from getcwd/master

arbiter: reopen log files first then signal workers
removed supervisor.conf autostart=true

it's true by default.
Merge pull request #873 from collinanderson/patch-2

removed supervisor.conf autostart=true
Small fixes to README.rst

* Correct capitalization of the Python Package Index acronym
* Change `heldeup` to `held up`