serverCert param, debugging printout, user dialogs, catch
socket exceptions, autodetect x11vnc for GET=1.
x11vnc: misc/scripts: desktop.cgi, inet6to4, panner.pl.
X11VNC_HTTPS_DOWNLOAD_WAIT_TIME, -unixpw %xxx documented, and
can run user cmd in UNIXPW_CMD. FD_XDMCP_IF for create script,
autodetect dm on udp6 only. Queries: pointer_x, pointer_y,
pointer_same, pointer_root. Switch on -xkd if keysyms per key >
4 in all cases. daemon mode improvements for connect_switch,
inet6to4, ultravnc_repeater.pl. Dynamic change of -clip do
not create new fb if WxH is unchanged.