LocIds containing a dot in the last segment fail to resolve

[phyrog]

When we have a locid like

/external/github.com/eugenk/test-import-dol/raw/master/OwlBase//https%253A%252F%252Fgithub.com%252Feugenk%252Ftest-import-dol%252Fraw%252Fmaster%252FOwlBase%2523OwlBaseClass

the router will fail to match the request to this page because the part

com%252Feugenk%252Ftest-import-dol%252Fraw%252Fmaster%252FOwlBase%2523OwlBaseClass

is assumed to be a format. So it only matches

/external/github.com/eugenk/test-import-dol/raw/master/OwlBase//https%253A%252F%252Fgithub

and also tries to resolve the mime type for

com%252Feugenk%252Ftest-import-dol%252Fraw%252Fmaster%252FOwlBase%2523OwlBaseClass

which of course also fails and results in a 406 Not Acceptable error.