main/socat: upgrade to 1.7.4.2
2021-10-31: Socat version 1.7.4.2 fixes a lot of bugs, e.g., for options -r and -R.
.bz2 release is named .bz so I did switch to .gz
2021-10-31: Socat version 1.7.4.2 fixes a lot of bugs, e.g., for options -r and -R.
.bz2 release is named .bz so I did switch to .gz