If someone attempts to resubmit an existing url, redirect to existing comments instead of submission form.
If someone attempts to resubmit an existing url, redirect to existing comments instead of submission form.

gitterHQ/pullup,larvalabs/pullup,josegonzalez/pullup,rickhanlonii/pullup,treygriffith/pullup,josegonzalez/pullup,Zarel/pullup,Zarel/pullup,gitterHQ/pullup,larvalabs/pullup,rickhanlonii/pullup,josegonzalez/pullup,treygriffith/pullup,Zarel/pullup,treygriffith/pullup,larvalabs/pullup,rickhanlonii/pullup,gitterHQ/pullup