email-mirror: Rewrite email mirror script on pure python.
email-mirror: Rewrite email mirror script on pure python.

The Zulip email mirror script called by postfix had performance/load
issues, because it spent so much time on startup/import due to use of
the Zulip virtualenv.

The script was rewritten using pure python (no Django) to improve
performance.

jrowan/zulip,jackrzhang/zulip,jrowan/zulip,Galexrt/zulip,hackerkid/zulip,amanharitsh123/zulip,brainwane/zulip,synicalsyntax/zulip,dhcrzf/zulip,zulip/zulip,rishig/zulip,hackerkid/zulip,vaidap/zulip,rht/zulip,punchagan/zulip,hackerkid/zulip,showell/zulip,mahim97/zulip,vaidap/zulip,kou/zulip,dhcrzf/zulip,kou/zulip,brockwhittaker/zulip,rht/zulip,andersk/zulip,tommyip/zulip,rishig/zulip,brockwhittaker/zulip,timabbott/zulip,vabs22/zulip,punchagan/zulip,eeshangarg/zulip,vaidap/zulip,punchagan/zulip,tommyip/zulip,andersk/zulip,timabbott/zulip,brockwhittaker/zulip,dhcrzf/zulip,punchagan/zulip,vaidap/zulip,shubhamdhama/zulip,hackerkid/zulip,eeshangarg/zulip,eeshangarg/zulip,zulip/zulip,Galexrt/zulip,showell/zulip,zulip/zulip,Galexrt/zulip,jackrzhang/zulip,shubhamdhama/zulip,jackrzhang/zulip,Galexrt/zulip,showell/zulip,rht/zulip,zulip/zulip,verma-varsha/zulip,synicalsyntax/zulip,Galexrt/zulip,showell/zulip,jrowan/zulip,dhcrzf/zulip,vabs22/zulip,mahim97/zulip,synicalsyntax/zulip,kou/zulip,timabbott/zulip,punchagan/zulip,hackerkid/zulip,amanharitsh123/zulip,rishig/zulip,shubhamdhama/zulip,jackrzhang/zulip,rht/zulip,brockwhittaker/zulip,jrowan/zulip,Galexrt/zulip,tommyip/zulip,rishig/zulip,kou/zulip,tommyip/zulip,rishig/zulip,shubhamdhama/zulip,Galexrt/zulip,tommyip/zulip,kou/zulip,rishig/zulip,brainwane/zulip,tommyip/zulip,vabs22/zulip,hackerkid/zulip,vaidap/zulip,zulip/zulip,kou/zulip,dhcrzf/zulip,amanharitsh123/zulip,verma-varsha/zulip,rht/zulip,jrowan/zulip,showell/zulip,jackrzhang/zulip,andersk/zulip,dhcrzf/zulip,verma-varsha/zulip,andersk/zulip,eeshangarg/zulip,andersk/zulip,brainwane/zulip,verma-varsha/zulip,andersk/zulip,shubhamdhama/zulip,vabs22/zulip,jackrzhang/zulip,brockwhittaker/zulip,synicalsyntax/zulip,rishig/zulip,synicalsyntax/zulip,showell/zulip,amanharitsh123/zulip,punchagan/zulip,brainwane/zulip,zulip/zulip,showell/zulip,timabbott/zulip,amanharitsh123/zulip,vaidap/zulip,verma-varsha/zulip,eeshangarg/zulip,dhcrzf/zulip,timabbott/zulip,shubhamdhama/zulip,timabbott/zulip,vabs22/zulip,synicalsyntax/zulip,hackerkid/zulip,brainwane/zulip,brainwane/zulip,eeshangarg/zulip,vabs22/zulip,brainwane/zulip,shubhamdhama/zulip,jrowan/zulip,verma-varsha/zulip,mahim97/zulip,mahim97/zulip,andersk/zulip,rht/zulip,timabbott/zulip,rht/zulip,mahim97/zulip,tommyip/zulip,kou/zulip,mahim97/zulip,synicalsyntax/zulip,jackrzhang/zulip,eeshangarg/zulip,punchagan/zulip,amanharitsh123/zulip,brockwhittaker/zulip,zulip/zulip