Comment 0 for bug 1971737

Since commit 95fd255d "rsrv: ignore CA client version older than v4.4" from Jul 30 2016, EPICS 3.13 clients cannot connect any more, even their CA version is V4.8.

The reason is that camessage drops the incoming CA_PROTO_SEARCH messages because the 3.13 client has not yet sent a CA_PROTO_VERSION message and thus the code reads client->minor_version_number as 0.

This is a huge hindrance for upgrading 3.14 IOCs to EPICS 7 when there are still 3.13 IOC (which cannot be upgraded yet) in the network which need to connect.