Handle email changes in user_events.update_person().
Handle email changes in user_events.update_person().

This code isn't active yet, since the back end doesn't send
events yet for email changes.

dattatreya303/zulip,kou/zulip,samatdav/zulip,eeshangarg/zulip,shubhamdhama/zulip,PhilSk/zulip,rht/zulip,PhilSk/zulip,brockwhittaker/zulip,dhcrzf/zulip,punchagan/zulip,verma-varsha/zulip,dattatreya303/zulip,synicalsyntax/zulip,PhilSk/zulip,susansls/zulip,mahim97/zulip,samatdav/zulip,JPJPJPOPOP/zulip,sonali0901/zulip,dhcrzf/zulip,jainayush975/zulip,Galexrt/zulip,jrowan/zulip,souravbadami/zulip,jrowan/zulip,eeshangarg/zulip,eeshangarg/zulip,eeshangarg/zulip,jackrzhang/zulip,mahim97/zulip,brainwane/zulip,andersk/zulip,dhcrzf/zulip,brockwhittaker/zulip,j831/zulip,brainwane/zulip,brockwhittaker/zulip,vabs22/zulip,rishig/zulip,hackerkid/zulip,mahim97/zulip,eeshangarg/zulip,brockwhittaker/zulip,rishig/zulip,aakash-cr7/zulip,susansls/zulip,ryanbackman/zulip,PhilSk/zulip,brainwane/zulip,verma-varsha/zulip,punchagan/zulip,sonali0901/zulip,hackerkid/zulip,showell/zulip,vabs22/zulip,brainwane/zulip,timabbott/zulip,punchagan/zulip,SmartPeople/zulip,tommyip/zulip,dattatreya303/zulip,brainwane/zulip,synicalsyntax/zulip,JPJPJPOPOP/zulip,souravbadami/zulip,souravbadami/zulip,SmartPeople/zulip,souravbadami/zulip,christi3k/zulip,blaze225/zulip,zulip/zulip,christi3k/zulip,showell/zulip,amanharitsh123/zulip,jackrzhang/zulip,rishig/zulip,andersk/zulip,j831/zulip,timabbott/zulip,JPJPJPOPOP/zulip,ryanbackman/zulip,vaidap/zulip,timabbott/zulip,dawran6/zulip,rht/zulip,kou/zulip,dattatreya303/zulip,andersk/zulip,SmartPeople/zulip,JPJPJPOPOP/zulip,hackerkid/zulip,hackerkid/zulip,aakash-cr7/zulip,Galexrt/zulip,christi3k/zulip,dhcrzf/zulip,j831/zulip,tommyip/zulip,tommyip/zulip,vaidap/zulip,sonali0901/zulip,SmartPeople/zulip,timabbott/zulip,rht/zulip,j831/zulip,kou/zulip,dhcrzf/zulip,tommyip/zulip,ryanbackman/zulip,zulip/zulip,shubhamdhama/zulip,amanharitsh123/zulip,eeshangarg/zulip,andersk/zulip,PhilSk/zulip,jphilipsen05/zulip,aakash-cr7/zulip,dawran6/zulip,zulip/zulip,christi3k/zulip,sonali0901/zulip,hackerkid/zulip,brainwane/zulip,rht/zulip,SmartPeople/zulip,dawran6/zulip,jphilipsen05/zulip,jainayush975/zulip,synicalsyntax/zulip,dattatreya303/zulip,ryanbackman/zulip,jackrzhang/zulip,christi3k/zulip,susansls/zulip,jrowan/zulip,dhcrzf/zulip,shubhamdhama/zulip,blaze225/zulip,susansls/zulip,jainayush975/zulip,rht/zulip,JPJPJPOPOP/zulip,rht/zulip,jphilipsen05/zulip,Galexrt/zulip,tommyip/zulip,susansls/zulip,amanharitsh123/zulip,PhilSk/zulip,synicalsyntax/zulip,ryanbackman/zulip,timabbott/zulip,jphilipsen05/zulip,dhcrzf/zulip,brainwane/zulip,showell/zulip,punchagan/zulip,hackerkid/zulip,hackerkid/zulip,vaidap/zulip,vaidap/zulip,souravbadami/zulip,zulip/zulip,vaidap/zulip,jainayush975/zulip,rishig/zulip,aakash-cr7/zulip,blaze225/zulip,jrowan/zulip,samatdav/zulip,Galexrt/zulip,kou/zulip,blaze225/zulip,amanharitsh123/zulip,verma-varsha/zulip,rishig/zulip,samatdav/zulip,j831/zulip,vabs22/zulip,amanharitsh123/zulip,mahim97/zulip,jackrzhang/zulip,rishig/zulip,jackrzhang/zulip,vabs22/zulip,shubhamdhama/zulip,samatdav/zulip,blaze225/zulip,showell/zulip,verma-varsha/zulip,synicalsyntax/zulip,jrowan/zulip,JPJPJPOPOP/zulip,amanharitsh123/zulip,zulip/zulip,tommyip/zulip,aakash-cr7/zulip,andersk/zulip,vabs22/zulip,jackrzhang/zulip,sonali0901/zulip,jphilipsen05/zulip,jackrzhang/zulip,shubhamdhama/zulip,aakash-cr7/zulip,susansls/zulip,j831/zulip,vaidap/zulip,SmartPeople/zulip,showell/zulip,dawran6/zulip,showell/zulip,timabbott/zulip,kou/zulip,shubhamdhama/zulip,showell/zulip,verma-varsha/zulip,synicalsyntax/zulip,kou/zulip,rht/zulip,andersk/zulip,tommyip/zulip,dawran6/zulip,mahim97/zulip,blaze225/zulip,Galexrt/zulip,punchagan/zulip,Galexrt/zulip,punchagan/zulip,eeshangarg/zulip,dattatreya303/zulip,timabbott/zulip,shubhamdhama/zulip,jrowan/zulip,jainayush975/zulip,kou/zulip,rishig/zulip,souravbadami/zulip,brockwhittaker/zulip,verma-varsha/zulip,zulip/zulip,ryanbackman/zulip,jainayush975/zulip,zulip/zulip,sonali0901/zulip,vabs22/zulip,synicalsyntax/zulip,samatdav/zulip,brockwhittaker/zulip,andersk/zulip,dawran6/zulip,punchagan/zulip,christi3k/zulip,Galexrt/zulip,jphilipsen05/zulip,mahim97/zulip