[Bro] 404 in INSTALL.html -> quickstart

[Darren Spruell]

Noticed http://www.bro.org/sphinx/INSTALL.html has a broken link to
Quick Start Guide.

X http://www.bro.org/documentation/quickstart.html

O http://www.bro.org/sphinx/quickstart.html

-- 
Darren Spruell
phatbuckett at gmail.com