Update -v documentation to reflect the new behaviour discussed
in bug #1851 where -v changes the log level to fixed levels
instead of an offset of the default log level configured
in suricata.yaml.
https://redmine.openinfosecfoundation.org/issues/2417
Add option to have pcap files deleted after they have been processed.
This option combines well with pcap file continuous and streaming
files to a directory being processed.
The command line options can now be consumed by the man page
and the user guide.
Some attempt was made to order the options from common/basic
progressing to advanced with some notion of options
grouped together.