Add overloads to enable short delegate syntax for URLRouter. Fixes #1668.
Add overloads to enable short delegate syntax for URLRouter. Fixes #1668.

etcimon/vibe.d,etcimon/vibe.d,chalucha/vibe.d,gedaiu/vibe.d,DBankov/vibe.d,Geod24/vibe.d,rejectedsoftware/vibe.d