[master] Document and log message typo corrections

    Merges in branch 'trac3872'

diff --cc doc/guide/classify.xml
Simple merge

diff --cc doc/guide/dhcp4-srv.xml
Simple merge

diff --cc doc/guide/dhcp6-srv.xml
Simple merge

diff --cc src/bin/admin/kea-admin.xml
Simple merge

diff --cc src/bin/d2/d2_messages.mes
Simple merge

diff --cc src/bin/dhcp4/dhcp4_messages.mes
Simple merge

diff --cc src/bin/dhcp6/dhcp6_messages.mes
Simple merge

diff --cc src/bin/lfc/kea-lfc.xml
Simple merge

diff --cc src/bin/lfc/lfc_messages.mes
Simple merge

diff --cc src/bin/perfdhcp/perfdhcp.xml
Simple merge

diff --cc src/lib/dhcpsrv/alloc_engine_messages.mes
Simple merge

diff --cc src/lib/dhcpsrv/dhcpsrv_messages.mes
Simple merge

diff --cc src/lib/dhcpsrv/hosts_messages.mes
Simple merge