This adds support for parsing PUSH_UPDATE
control command, which enables to update
options "on the fly", without reconnect.
The options presented in the PUSH_UPDATE list
overwrite current options with the name. To unset
an option, it has to be prefixed with the "-".
For example:
PUSH_UPDATE,route 10.10.10.0 255.255.255.0,-dns
Replaces all existing routes with this new one
and removes all "dns" options.
If the client doesn't support updating certain option,
it reconnects. Except when option is prefixed with "?" -
in this case option is considered "optional".
For example, this message
PUSH_UPDATE,?unsupported_option_a
does nothing, but this one:
PUSH_UPDATE,dns 0,block-ipv6,unsupported_option_b
makes client reconnect, since it contains mandatory unsupported option.
OVPN3-1234
Signed-off-by: Lev Stipakov <lev@openvpn.net>
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