reload: Clean up handling of invalid reload tokens.
reload: Clean up handling of invalid reload tokens.

Previously, we'd log an exception whenever an invalid hashchange
reload token appeared, which is probably a bit excessive given that
this can happen without anything being wrong.

We instead just log something for debugging in the blueslip log and
make sure the #reload hash is cleared.

rishig/zulip,dhcrzf/zulip,vabs22/zulip,showell/zulip,verma-varsha/zulip,vabs22/zulip,showell/zulip,christi3k/zulip,rishig/zulip,j831/zulip,kou/zulip,tommyip/zulip,andersk/zulip,christi3k/zulip,hackerkid/zulip,kou/zulip,zulip/zulip,brockwhittaker/zulip,showell/zulip,christi3k/zulip,jphilipsen05/zulip,jphilipsen05/zulip,shubhamdhama/zulip,andersk/zulip,andersk/zulip,Galexrt/zulip,shubhamdhama/zulip,punchagan/zulip,dhcrzf/zulip,tommyip/zulip,rishig/zulip,christi3k/zulip,punchagan/zulip,j831/zulip,amanharitsh123/zulip,Galexrt/zulip,zulip/zulip,brainwane/zulip,kou/zulip,jrowan/zulip,hackerkid/zulip,jackrzhang/zulip,ryanbackman/zulip,timabbott/zulip,jphilipsen05/zulip,timabbott/zulip,showell/zulip,hackerkid/zulip,amanharitsh123/zulip,Galexrt/zulip,brockwhittaker/zulip,kou/zulip,showell/zulip,rht/zulip,rht/zulip,dhcrzf/zulip,vaidap/zulip,jackrzhang/zulip,vabs22/zulip,dhcrzf/zulip,amanharitsh123/zulip,eeshangarg/zulip,kou/zulip,dhcrzf/zulip,verma-varsha/zulip,christi3k/zulip,eeshangarg/zulip,brockwhittaker/zulip,synicalsyntax/zulip,timabbott/zulip,vabs22/zulip,showell/zulip,zulip/zulip,rht/zulip,vaidap/zulip,punchagan/zulip,shubhamdhama/zulip,andersk/zulip,synicalsyntax/zulip,mahim97/zulip,andersk/zulip,j831/zulip,jackrzhang/zulip,zulip/zulip,jrowan/zulip,rht/zulip,jackrzhang/zulip,synicalsyntax/zulip,brainwane/zulip,amanharitsh123/zulip,eeshangarg/zulip,rishig/zulip,vabs22/zulip,jrowan/zulip,Galexrt/zulip,rht/zulip,eeshangarg/zulip,synicalsyntax/zulip,mahim97/zulip,mahim97/zulip,jackrzhang/zulip,timabbott/zulip,mahim97/zulip,dhcrzf/zulip,ryanbackman/zulip,amanharitsh123/zulip,Galexrt/zulip,rht/zulip,hackerkid/zulip,timabbott/zulip,tommyip/zulip,jrowan/zulip,hackerkid/zulip,mahim97/zulip,dhcrzf/zulip,brainwane/zulip,eeshangarg/zulip,synicalsyntax/zulip,jrowan/zulip,christi3k/zulip,punchagan/zulip,jackrzhang/zulip,verma-varsha/zulip,vabs22/zulip,timabbott/zulip,verma-varsha/zulip,rht/zulip,eeshangarg/zulip,j831/zulip,rishig/zulip,brainwane/zulip,amanharitsh123/zulip,timabbott/zulip,shubhamdhama/zulip,verma-varsha/zulip,zulip/zulip,jrowan/zulip,zulip/zulip,vaidap/zulip,vaidap/zulip,Galexrt/zulip,rishig/zulip,ryanbackman/zulip,verma-varsha/zulip,ryanbackman/zulip,hackerkid/zulip,punchagan/zulip,punchagan/zulip,jphilipsen05/zulip,jphilipsen05/zulip,brainwane/zulip,brockwhittaker/zulip,j831/zulip,zulip/zulip,kou/zulip,kou/zulip,brainwane/zulip,Galexrt/zulip,andersk/zulip,mahim97/zulip,shubhamdhama/zulip,shubhamdhama/zulip,eeshangarg/zulip,j831/zulip,showell/zulip,tommyip/zulip,synicalsyntax/zulip,andersk/zulip,punchagan/zulip,brainwane/zulip,hackerkid/zulip,vaidap/zulip,brockwhittaker/zulip,rishig/zulip,tommyip/zulip,tommyip/zulip,ryanbackman/zulip,tommyip/zulip,ryanbackman/zulip,shubhamdhama/zulip,jphilipsen05/zulip,brockwhittaker/zulip,jackrzhang/zulip,vaidap/zulip,synicalsyntax/zulip