Log Message:
Update to 0.73

Changelog:
Vulnerabilities fixed in this release include:

 - On Windows, the listening sockets used for local port forwarding
   were opened in a mode that did not prevent other processes from
   also listening on the same ports and stealing some of the incoming
   connections.

 - In the PuTTY terminal, bracketed paste mode was broken in 0.72, in
   a way that made the pasted data look like manual keyboard input. So
   any application relying on the bracketing sequences to protect
   against malicious clipboard contents would have been misled.

 - An SSH-1 server could trigger an access to freed memory by sending
   the SSH1_MSG_DISCONNECT message. Not known to be exploitable.

Other bug fixes include:

 - Windows Plink no longer crashes on startup when it tries to tell
   you it's reusing an existing SSH connection.

 - Windows PuTTY now updates its terminal window size correctly if the
   screen resolution changes while it's maximised.

 - If you display the coloured error messages from gcc in the PuTTY
   terminal, there is no longer a missing character if a colour change
   happens exactly at the end of a line.

 - If you use the 'Clear Scrollback' menu option or escape sequence
   while text in the scrollback is selected, it no longer causes an
   assertion failure.