Conflicts:
	src/lib/asiolink/io_address.h
	src/lib/asiolink/tests/io_address_unittest.cc

 - IOAddress::increase() simplified
 - getLeasesCount renamed to getPoolCapacity
 - removed several intermediate variables

 - increaseAddress renamed to increase
 - check that addrsInRange throw when max < min
 - C++ style casts, consts added
 - check that a can be subtracted from b, when a>b
 - documentation for IOAddress::increase, subtract improved
 - couple unnecessary intermediate objects removed

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