Add unique token check to protocol handshake

[wagnerrp]

This patch adds a randomly generated token to the MYTH_PROTO_VERSION call. The purpose of this is to provide a unique token for each protocol version to check against, to ensure the client actually speaks the proper protocol, and isn't simply responding with the version handed out by a previous connection. The current string is just a randomly generated 8-digit hex string.

This was motivated by a recent discussion in the mailing list where the 'libcmyth' library was touted as a well maintained interface for accessing MythTV, while it has not actually been updated since protocol version 44.

[cpinkham]

(In [26280]) dd unique token check to protocol handshake in addition to the MythTV protocol version. Clients will now be required to pass in a unique token specific to that protocol version when connecting to the backend.

NOTE: This does bump the protocol version, so update the core of MythTV as well as MythWeb and the python and perl bindings.

Closes #8877 using patch by Raymond Wagner.

[cpinkham]

(In [26281]) Add unique token check to protocol handshake in addition to the MythTV protocol version. Clients will now be required to pass in a unique token specific to that protocol version when connecting to the backend.

NOTE: This does bump the protocol version, so update the core of MythTV as well as MythWeb and the python and perl bindings.

References #8877.

This brings MythWeb up to date with trunk [26280].

[cpinkham]

(In [26288]) Make the version mismatch error message a little more correct now that the version mismatch could be either in the protocol version or the token passed with the versoin number.

References #8877.

[cpinkham]

(In [26296]) Combine some strings instead of letting the compiler try to determine what the right thing to do is (which it didn't in this case).

Refs #8877.