doc update
updated coding style
removed duplicate definition; reported by Dennis Philipps.
moved priorities check to the first call only.
New option --stricttofu for gnutls-cli

With option --tofu, gnutls-cli waits with a yes-no-question upon
certificate changes.  I added the option --stricttofu that omits the
question and fails instead.

The contribution is in accordance to the "Developer's Certificate of
Origin" as found in the file doc/DCO.txt.

Best wishes
Jens

Signed-off-by: Jens Lechtenbörger <jens.lechtenboerger@fsfe.org>
Updated verification function
updated for verification updates
removed not trusted message; reported by Michel Briand.
added doc on is_issuer() checks
Preinitialize values; suggested by Sebastian Krahmer and Tomas Hoger.
Add required priorities
the default priorities are reset to be NORMAL.

Reported by Manuel Pégourié-Gonnard.
documented the defaults
mention SHA384 as MAC option
Revert "the default priorities are reset to be NORMAL."

This reverts commit 9c07f75676b6b70da10e99c409b0cb7dbc245463.
The default priority is reset to NORMAL
Allow all ciphersuites in SSL3.0 when they are available in TLS1.0
updated gnulib
Added NULL PSK ciphersuites with SHA1; suggested by Manuel Pégourié-Gonnard.
print message before failing when the pull timeout function isn't replaced.