appview/repo: allow compare URLs to not be path escaped
this changes the routing logic slightly to allow non-path escaped refs
in compare urls that use the `...` syntax:
previously only this worked:
/compare/master/sl%2Fuvpzuszrulvq
/compare/master...sl%2Fuvpzuszrulvq
with this patch:
/compare/master/sl%2Fuvpzuszrulvq
/compare/master...sl%2Fuvpzuszrulvq
/compare/master...sl/uvpzuszrulvq (new)
Signed-off-by: oppiliappan <me@oppi.li>
authored by