Fix tyop

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Update sourceforge links to point to github.
Ignore rfbproto.rst

A more up-to-date version of the RFB protocol is maintained by TigerVNC:

	http://sourceforge.net/p/tigervnc/code/HEAD/tree/rfbproto/rfbproto.rst

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Ignore the vencrypt document

	https://www.berrange.com/~dan/vencrypt.txt

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Ignore the 'mac' example, too

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
libvncclient: If we have TLS support, enable VeNCrypt by default

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>