Basic changes to make linux-atm build without any issues with GCC 14.
Besides some errors caused by -Wpointer-sign, there was also an issue
with socklen_t not being used for getsockopt() and accept()
sometimes.
I also updated the Debian patch to include the latest changes from
version "1:2.5.1-5.1" in Debian Sid. This allowed me to drop
"600-fix-format-errors.patch" and "700-include_sockios.patch".
Signed-off-by: Rany Hany <rany_hany@riseup.net>
