redirects.dat - split non-canonical to separate section
This is basically step one for implementing the secure redirector
service for non-canonical domains: split up the existing redirects
file so we can easily tell what needs porting over to it, and deal
with any edge-cases that need cleanup or special support first.
Commandline grep/sort output confirms the same total set of rules
exists in the old and new versions, just in a different order.
The original ordering of the rules is preserved within each
There is some risk here, as rule evaluation is order-sensitive in
apache in general. If the command at the top of the file to never
do double-redirects in this file has been followed strictly,
re-ordering shouldn't be an issue, but we should double-check.