Remove RPM sources file, we don't use it
Set some reasonable default download timeouts so that server problems don't block downloads for an extremely long time
We should try to compile native_support first instead of downloading it, because compilation is nearly instantaneous
Support downloading native_support binaries from mirrors
Support downloading Passenger Standalone support binaries from mirrors
Change a test name
The 'gem install' extconf.rb now supports downloading binaries from mirrors
Remove unused constants and methods