Merge branch 'V5-4-patches' into V5-5-patches

* V5-4-patches:
  CHANGES: snmplib: Rename memdup() into netsnmp_memdup()

Conflicts:
	agent/agent_handler.c
	agent/agent_trap.c
	agent/helpers/table_data.c
	agent/helpers/table_dataset.c
	agent/helpers/table_row.c
	agent/helpers/table_tdata.c
	agent/helpers/watcher.c
	agent/mibgroup/notification/snmpNotifyFilterProfileTable.c
	agent/mibgroup/utilities/override.c
	apps/snmptrapd_handlers.c
	include/net-snmp/library/tools.h
	local/mib2c.iterate_access.conf
	man/netsnmp_util.3
	snmplib/snmp_api.c
	snmplib/tools.c
	win32/libsnmp_dll/libsnmp.def.in