Log Message:
Update socat to 1.7.1.3

Changelog:

security:
	fixed a stack overflow vulnerability that occurred when command
	line arguments (whole addresses, host names, file names) were longer
	than 512 bytes.
	Note that this could only be exploited when an attacker was able to
	inject data into socat's command line.
	Full credits to Felix Grobert, Google Security Team, for finding and
	reporting this issue