Add forgotten password doc.
Add forgotten password doc.

Fixes #2998.

PhilSk/zulip,souravbadami/zulip,niftynei/zulip,vabs22/zulip,dawran6/zulip,dhcrzf/zulip,rishig/zulip,mahim97/zulip,souravbadami/zulip,punchagan/zulip,aakash-cr7/zulip,jphilipsen05/zulip,brainwane/zulip,zulip/zulip,AZtheAsian/zulip,vaidap/zulip,sharmaeklavya2/zulip,tommyip/zulip,punchagan/zulip,hackerkid/zulip,Diptanshu8/zulip,timabbott/zulip,amyliu345/zulip,showell/zulip,j831/zulip,shubhamdhama/zulip,blaze225/zulip,vabs22/zulip,mahim97/zulip,timabbott/zulip,eeshangarg/zulip,cosmicAsymmetry/zulip,tommyip/zulip,jainayush975/zulip,eeshangarg/zulip,blaze225/zulip,j831/zulip,brainwane/zulip,aakash-cr7/zulip,dhcrzf/zulip,jphilipsen05/zulip,kou/zulip,souravbadami/zulip,sharmaeklavya2/zulip,christi3k/zulip,ryanbackman/zulip,jrowan/zulip,synicalsyntax/zulip,samatdav/zulip,jackrzhang/zulip,dawran6/zulip,kou/zulip,showell/zulip,samatdav/zulip,Galexrt/zulip,tommyip/zulip,eeshangarg/zulip,isht3/zulip,AZtheAsian/zulip,shubhamdhama/zulip,Galexrt/zulip,cosmicAsymmetry/zulip,kou/zulip,showell/zulip,verma-varsha/zulip,sharmaeklavya2/zulip,PhilSk/zulip,Diptanshu8/zulip,dawran6/zulip,zulip/zulip,rishig/zulip,amanharitsh123/zulip,SmartPeople/zulip,rishig/zulip,punchagan/zulip,susansls/zulip,sharmaeklavya2/zulip,jphilipsen05/zulip,ryanbackman/zulip,AZtheAsian/zulip,hackerkid/zulip,synicalsyntax/zulip,andersk/zulip,mahim97/zulip,showell/zulip,brainwane/zulip,jphilipsen05/zulip,PhilSk/zulip,amyliu345/zulip,jrowan/zulip,samatdav/zulip,dawran6/zulip,j831/zulip,christi3k/zulip,brainwane/zulip,JPJPJPOPOP/zulip,amanharitsh123/zulip,rishig/zulip,amyliu345/zulip,jphilipsen05/zulip,dattatreya303/zulip,Galexrt/zulip,isht3/zulip,jainayush975/zulip,cosmicAsymmetry/zulip,dhcrzf/zulip,JPJPJPOPOP/zulip,eeshangarg/zulip,Diptanshu8/zulip,andersk/zulip,vaidap/zulip,isht3/zulip,zulip/zulip,brainwane/zulip,amanharitsh123/zulip,synicalsyntax/zulip,vabs22/zulip,rht/zulip,dattatreya303/zulip,cosmicAsymmetry/zulip,tommyip/zulip,jackrzhang/zulip,blaze225/zulip,brainwane/zulip,brockwhittaker/zulip,Galexrt/zulip,timabbott/zulip,dhcrzf/zulip,eeshangarg/zulip,aakash-cr7/zulip,susansls/zulip,christi3k/zulip,JPJPJPOPOP/zulip,dattatreya303/zulip,susansls/zulip,Diptanshu8/zulip,rht/zulip,kou/zulip,timabbott/zulip,andersk/zulip,timabbott/zulip,JPJPJPOPOP/zulip,amanharitsh123/zulip,jackrzhang/zulip,dhcrzf/zulip,synicalsyntax/zulip,ryanbackman/zulip,dhcrzf/zulip,rishig/zulip,verma-varsha/zulip,punchagan/zulip,verma-varsha/zulip,kou/zulip,hackerkid/zulip,synicalsyntax/zulip,ryanbackman/zulip,tommyip/zulip,AZtheAsian/zulip,brockwhittaker/zulip,Diptanshu8/zulip,mahim97/zulip,andersk/zulip,Galexrt/zulip,JPJPJPOPOP/zulip,Diptanshu8/zulip,vabs22/zulip,mahim97/zulip,Galexrt/zulip,aakash-cr7/zulip,sonali0901/zulip,shubhamdhama/zulip,eeshangarg/zulip,amanharitsh123/zulip,kou/zulip,jrowan/zulip,JPJPJPOPOP/zulip,souravbadami/zulip,tommyip/zulip,blaze225/zulip,synicalsyntax/zulip,niftynei/zulip,brockwhittaker/zulip,zulip/zulip,niftynei/zulip,dhcrzf/zulip,jackrzhang/zulip,PhilSk/zulip,brockwhittaker/zulip,zulip/zulip,brockwhittaker/zulip,isht3/zulip,shubhamdhama/zulip,jackrzhang/zulip,cosmicAsymmetry/zulip,cosmicAsymmetry/zulip,niftynei/zulip,jainayush975/zulip,jackrzhang/zulip,rishig/zulip,samatdav/zulip,samatdav/zulip,andersk/zulip,vaidap/zulip,mahim97/zulip,j831/zulip,vaidap/zulip,jrowan/zulip,jainayush975/zulip,hackerkid/zulip,sharmaeklavya2/zulip,brockwhittaker/zulip,rht/zulip,amanharitsh123/zulip,niftynei/zulip,eeshangarg/zulip,SmartPeople/zulip,SmartPeople/zulip,hackerkid/zulip,jphilipsen05/zulip,vabs22/zulip,vaidap/zulip,SmartPeople/zulip,amyliu345/zulip,souravbadami/zulip,aakash-cr7/zulip,PhilSk/zulip,jainayush975/zulip,zulip/zulip,dattatreya303/zulip,sonali0901/zulip,SmartPeople/zulip,punchagan/zulip,shubhamdhama/zulip,souravbadami/zulip,sonali0901/zulip,showell/zulip,punchagan/zulip,vabs22/zulip,showell/zulip,AZtheAsian/zulip,shubhamdhama/zulip,andersk/zulip,andersk/zulip,timabbott/zulip,sharmaeklavya2/zulip,dawran6/zulip,SmartPeople/zulip,rht/zulip,zulip/zulip,sonali0901/zulip,jrowan/zulip,hackerkid/zulip,jackrzhang/zulip,vaidap/zulip,susansls/zulip,ryanbackman/zulip,showell/zulip,isht3/zulip,isht3/zulip,sonali0901/zulip,rht/zulip,synicalsyntax/zulip,christi3k/zulip,Galexrt/zulip,kou/zulip,niftynei/zulip,verma-varsha/zulip,sonali0901/zulip,hackerkid/zulip,rht/zulip,aakash-cr7/zulip,susansls/zulip,timabbott/zulip,AZtheAsian/zulip,tommyip/zulip,j831/zulip,jainayush975/zulip,punchagan/zulip,dawran6/zulip,amyliu345/zulip,rishig/zulip,brainwane/zulip,verma-varsha/zulip,PhilSk/zulip,christi3k/zulip,dattatreya303/zulip,ryanbackman/zulip,shubhamdhama/zulip,susansls/zulip,blaze225/zulip,christi3k/zulip,samatdav/zulip,rht/zulip,dattatreya303/zulip,verma-varsha/zulip,j831/zulip,jrowan/zulip,blaze225/zulip,amyliu345/zulip