obmc-console: Introduce console-id, deprecate socket-id

The name `socket-id` exposes too much detail about the implementation.
Really the tag identifies the console, so name it as such.

Maintain backwards compatibility until we've converted all the in-tree
OpenBMC users over to `console-id`. Once that's done we can drop support
for `socket-id`.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Change-Id: I5aa2ba84835d64901e459b42bfe7be59043466c7
diff --git a/conf/client.2200.conf.in b/conf/client.2200.conf.in
index 538cb55..fe8a905 100644
--- a/conf/client.2200.conf.in
+++ b/conf/client.2200.conf.in
@@ -1 +1 @@
-socket-id = host
+console-id = host