feature #2435: TOTALMEMORY should be an integer instead of a float
feature #2435: Change poll hostname argument
feature #2435: Add extra monitoring information for EC2 VMs
	New tags:
		AWS_DNS_NAME
		AWS_PRIVATE_DNS_NAME
		AWS_KEY_NAME
		AWS_AVAILABILITY_ZONE
		AWS_PLATFORM
		AWS_VPC_ID
		AWS_PRIVATE_IP_ADDRESS
		AWS_IP_ADDRESS
		AWS_SUBNET_ID
		AWS_SECURITY_GROUPS
		AWS_INSTANCE_TYPE
feature #2435: Add BLOCKDEVICEMAPPING support
Feature #2435 #2092: New generic HYBRID section in VMs, better automatic_requirements
feature #2435 #2092: Bug in VirtualMachine::get_hybrid_hypervisors
Feature #2435 #2092: Skip storage scheduling for hybrid hosts
Feature #2435 #2092: Add HYBRID=YES to ec2 probes
Feature #2435 #2092: Code cleanup.

Hybrid hosts are not detected with the generic HYBRID=YES
Feature #2435 #2092: Allow deployment to hybrid hosts using system DS -1
Feature #2435 #2092: Rename HYBRID to PUBLIC_CLOUD
Feature #2435 #2092: New host and ds sched policy: fixed

This new policy simply uses the PRIORITY template attribute
that the admin can set manually.
Feature #2435 #2092: Log when the sched discards the current Host for resched VMs
Feature #2435 #2092: Do not allow migrations to/from a public cloud host