added error messages if requested CAs or keys are not found
added --gnutls-otpions to directly set a GnuTLS priority string
added --gnutls-options to NEWS file
Merge branch 'master' into develop
fix sigfault in cookie functions
updated public suffixes list
added experimental PSL code
fixed up cookie code
working on example/psl.c
make cookies and tests working with new PSL
changes on psl.c
removed psl.c from examples
fix some clang warnings
added test--page-requisites and fixed -p/--page-requisites
do not keep tmpfiles in test--page-requisites.c
fixed HTML parsing of uppercase attributes (fixes issue #21)
removed two lines of debugging output
check for HTTP/HTTPS in add_url()
make distcheck without -j4
fixed race-condition on 'known_urls' variable