Ubuntu Xenial carries an older version of glib/gio and vala. Try not to use
'features' that may not work.

When sharing URLs through KDE Connect, the incoming "url" usually contains some
additional description that was added by the source application. Use regext to
pick up any valid http[s] URLs that may be found in the text.

drop autotools, use meson exclusively

Signed-off-by: Maciek Borzecki <maciek.borzecki@gmail.com>

TLS support

Fingerprint is avaialble as CertificateFingerprint property, the format is the
same as produced by GnuTLS' certtool, eg:

   sha1:d7860c6978d714e9e8f9805065602ea14e295df9