doc/guide/dhcp6-srv.xml
    Updated "Reserving a hostname" section
    (also removed trailing spaces)

src/bin/dhcp6/dhcp6_srv.cc
   corrected test and commentary typo in assignIA_NA
   removed second parameter to renewLeases6() calls

src/bin/dhcp6/dhcp6_srv.h
    updated commentary for createContext()

src/lib/dhcpsrv/alloc_engine.cc
src/lib/dhcpsrv/alloc_engine.h
    AllocEngine::createLease6()
        removed find_host parameter and logic which calls
        findReservation and/or alters context hostname

src/lib/dhcpsrv/tests/alloc_engine_utils.cc
    AllocEngine6Test::renewTest() - added call to
    AllocEngine6Test::findReservation()

src/lib/dhcpsrv/tests/alloc_engine_utils.h
    fixed typo