The number of copiers and pullers is set to default at config loading
time, but the new folder configuration doesn't pass through config
loading so we start up with 0 copiers and 0 pullers and hence get stuck.
I moved the default handling to the puller itself instead. I think this
way is also cleaner as we get to keep the 0 in the config and the puller
gets to decide the defaults on it's own.
* v0.11:
Translations and docs update
Enable browser caching of static resources
Handle multiple case insensitivity prefixes in ignores (fixes#2134)
Make rescan available for unshared folders
Add timeout for peek (fixes#1035)
Fix TestReset when Syncthing shuts down too fast
Clarify password in integration tests
Properly rename config files during integration tests (fixes#1769)
