Add missing settings to .ini file

- interval
- daemon
- verbose
- pid_file
IMBU has funded this project
Handle single register in slave mode
Only print values to STDOUT if running in verbose mode.
Assign socket descriptor to 's' after reconnecting to recorder socket.
Only output debug-output in verbose mode.
Try to connect once on local socket

When local socket is not connected, try to connect once and then
discard output if socket still can't be connected to prevent that
data is recorded with a long delay and possibly processed in the
incorrect timeslot.
Display in output_write needs verbose

output_write needs opt->verbose in order to decide whether or
not to output debug info.
Make sure socket descriptor is set to -1

With this change output_is_connected 'knows' if the socket is
connected.
Merge error and minor spaces
New mode to replace listen option

Two modes are allowed actually, master and slave.
Merge branch 'master' of git://github.com/webstack/mbtools

Conflicts:
	src/collect.c
	src/output.c