The dpd signature missed a few cases that are used for TLS 1.3,
especially when draft versions (which are all that we are seeing at the
moment) are being negotiated.
This fix mostly allows draft versions in the server hello (identified by
7F[version]; since we do not know how many drafts there will be, we are
currently allowing a rather safe upper limit.
This change adds compression methods to the ssl_client_hello event. It
not being included was an oversight from a long time ago.
This change means that the signature of ssl_client_hello changes
slightly and scripts will have to be adjusted; since this is a commonly
used event, the impact of it might be higher than usually for event
changes.
The alert in this case is caused by the server name in the SNI not being
recognized by the server, which triggers an alert. Since the server is
an apache, and this might happen reasonably often, the new signature
allows one TLS alert before the server hello is expected.
