Cannot run Hudson on AS5

[alrubinger]

@see https://hudson.dev.java.net/issues/show_bug.cgi?id=2831

This will stall our installation of new Hudson instances based on AS5 until resolved.

The simple fix (ie. correcting the protocol assumptions) lead to errors elsewhere, so I need to spend more time digging.

S,
ALR

[alrubinger]

I've updated https://www.jboss.org/community/docs/DOC-13233 to reflect the error and warn users.

S,
ALR