Kegan Dougal 83bcdcee61 Return early on /sync code paths if a '*' filter is used
This is currently very conservative in that it only does this if there is no
`since` token. This limits the risk to clients likely to be doing one-off
syncs (like bridges), but does mean that normal human clients won't benefit
from the time savings here. If the savings are large enough, I would consider
generalising this to just check the filter.
2016-11-22 16:38:35 +00:00
..
2016-01-07 04:26:29 +00:00