prepared --homes and --homes-group options
zero out session_data structure before free()ing it
reset session store before free()ing RS_EVENT_BASE, so events don't get double-freed
started README
leakcheck: don't wait for sessions to expire
added init script & install it in "install" target
added --homes-min-uid option, removed --homes-group option in turn
implemented webfinger for --homes based on system users
turned log_debug() into a macro, so we can log files & line numbers
don't warn about running as root, when --homes is given (not optimal, but it wouldn't work anyway w/o running as root at the moment)
README: clarify we need libevent 2.0