Parse cookies when users set custom Host header
Comment our reasonsing for the special cases
Fix typo
upate urllib3 to a0c986a24d
add myself to AUTHORS.rst
Merge pull request #1726 from t-8ch/update_urllib3

Update urllib3
Merge pull request #1724 from daftshady/dev3

Fixed #1723
Merge pull request #1660 from sigmavirus24/parse-cookies-when-users-set-host-header

Parse cookies when users set custom Host header
Fixed #1711
added test case related to #1711
added new method 'merge_cookies' and use it when merging session cookies with param cookies.
update 'merge_cookies'
modified 'merge_cookies' and update tests.
made sessions.py to use that method when merging cookies.
update 'merge_cookies' not to create new instance.
double try statement
remove unnecessary try