Conflicts:
	doc/Makefile.am

Add log support for LFC

Add statistics support in lease files used
by LFC to report stats for leases.

Update memfile tests to check that LFC
did the right thing.

Merge branch 'trac3667'

Conflicts:
	ChangeLog
	src/lib/util/csv_file.h

Move lease_stats.h to leae_file_stats.h

Move logging init code into its own function.

Conflicts:
	src/lib/dhcpsrv/tests/alloc_engine_unittest.cc

By default log to syslog on local0.  If the -d option is
enabled log to the console.

Some general cleanup

Update the log messages

Send the log output to syslog rather than the console

Complete the current working on using the basic logging system
for messages from LFC

Add lease_stats to provide a class to gather statistics
about reading and writing leases to files.  Currently this
is used by the CSV file code and output by LFC.  The
information counted is: number of attempts, number of leases
and number of errors generated during reads and writes.