Log Message:
Update to tightvnc 1.2.6.   Notable changes:

all:
- supply manual pages

Xvnc:
- fixed crash in the font server code
- fixed blocking I/O problem which led to easy denial-of-service
  attacks via built-in HTTP server
- fixed memory alignment problem in Raw encoder, for systems with
  strict alignment constraints
- support libwrap for server access control
- rely upon system zlib instead of shipping own copy
- reset compression level & JPEG image quality on reading client's encoding list
- allow applet parameters to be specified in URL request to the HTTP server

vncpasswd:
- work correctly if a filename is given

vncserver:
- default depth is 24 instead of 8
- attempt restart once if failed first time due to font path lossage
- removed 2 second startup delay
- allow users to keep vnc directories in /tmp
- work correctly if $XAUTHORITY is not set