Add a config option which explicitly controls whether we pass the
VIR_MIGRATE_TUNNELLED flag to libvirt. This is a lot more covenient
than having users modify a list of obscure flags.
Note that this especially makes sense as part of a longer term plan
to remove the live_migration_flag and block_migration_flag config
options completely, and instead have config options for controlling
specific behavior choices that operators care about.
Note also that review Id8b38b0978cdc80df37cb26bb69d8f4bec5bf766
essentially proposes changing the default of this config value
to false.
DocImpact
Change-Id: I8d77596860a7803f8549cde4277e9a0509e4675a
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
621594fc41