Add URL fragment to sign-in form
Add URL fragment to sign-in form

This allows a seamless transition for applications that encode
state in the fragment.

kalibrr/oauth2_proxy,snormore/oauth2_proxy,bitly/google_auth_proxy,ploxiln/oauth2_proxy,coreos/oauth2_proxy,coreos/oauth2_proxy,kbudde/oauth2_proxy,ploxiln/oauth2_proxy,snormore/oauth2_proxy,ITNG/oauth2_proxy,bitly/oauth2_proxy,kalibrr/oauth2_proxy,andyuc88/oauth2_proxy_azure,jehiah/oauth2_proxy,ITNG/oauth2_proxy,andyuc88/oauth2_proxy_azure,bitly/oauth2_proxy,tamsky/oauth2_proxy,kbudde/oauth2_proxy,Shopify/google_auth_proxy,Shopify/google_auth_proxy,bitly/google_auth_proxy,Shopify/google_auth_proxy,18F/oauth2_proxy,tamsky/oauth2_proxy,18F/oauth2_proxy,jehiah/oauth2_proxy