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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.

Added commits for all tickets implementing kea-lfc. Also, corrected the
LRC design url. Commiting on my discretion.

This branch adds the main processing functions for
lease file cleanup.  We added

code in lease_file_loader.h to write leases from storage to a file

code in lfc_controller to read leaes into storage from a file
and then write the storage out to a file (using lease_file_loader)
and then to move the files around to get the names correct.

Conflicts:
	ChangeLog

Conflicts:
	src/lib/dhcpsrv/alloc_engine.cc

 - if-else clauses in allocateLeases6
 - allocateUnreservedLeases6 uses for instead of do loop

One of the large items was to rearrange the
lfc_controller test code to:
- not use .c_str()
- check the non-existance of the temporary files after processing
- remove any files after each subtest
- Use a_1 instead of A_1 for variable names

There were also some other coding standards issues as well
as additional comments and such.

 - Dhcp6Client::oro_ is now private
 - Dhcp6Srv::copyDefaultOptions renamed to copyClientOptions
 - Comment in processInfRequest clarified

Add more tests to verity the cleanup of leases files

Cleanup the code for comments, typos, spaces and the like.

Replaced the do-while loop with the for loop in the allocateLease4. Also,
updated the copyright date.

 - general improvements in AllocEngine
 - doc updated

Add the write method to lease_file_loader to dump the leaes files
from a storage container into a file.

Update the LFC code to use the lease_file_loader functions to
load the leases from the appropriate files and then to write
them to the output file and finally to move the file around.

After we have completed writing the lease file and moved it to finish
we need to delete the previous and copy files if they exist and move
the finish file to previous.