Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

speed improvements: change scheduler to SCHED_FIFO, Disable realtime throttling, use in-memory db for sqlite core channels table (set core-db-name to 'core' in switch.conf.xml for previous behaviour of using the core sqlite file, now only aliases will be in the persistant db)

If you pass --enable-skip-subdirectories then configure will skip
configuring or reconfiguring libraries and simply configure the FS
core itself.