Bump API version to 2.4

Signed-off-by: John Else <john.else@citrix.com>
Bump API version number on API docs

Signed-off-by: John Else <john.else@citrix.com>
CP-9795: Use ip tool instead of ifconfig

The output of ifconfig varies by version so rather parse the output
of the ip tool.

Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Merge pull request #2044 from rosslagerwall/ifconfig-output

CP-9795: Use ip tool instead of ifconfig
Merge pull request #2036 from johnelse/api-version-bump

API version bump