Committing on my own discretion as it is an obvious error in the text.

Conflicts:
	src/bin/dhcp6/dhcp6_srv.cc

 - See 3643, comment 5 for explanation

- Documentation for reservation-mode added
- spec files updated
- unit-tests for HR no longer use eth0 or eth1
- @todos added when allow_new_leases_in_renewals_ is expected to be used
- HR unit-test no longer uses at()
- Copyright years updated
- getOptionalParam() used when handling reservation-mode
- hrModeFromText() moved to SubnetConfigParser
- hrModeFromText() starts with lowercase and has its documentation expanded

Conflicts:
	doc/Makefile.am

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

Log a warning if multiple addresses on the same interface are in use,
when raw sockets are in use.