kernel-module/Makefile: install - create the /lib/modules/…/updates directory

[dilyanpalauzov]

… if it does not exist.

daemon/rtpengine.pod: spell what MOS means

MAX_SESSIONS in config file does not work, it must be max-sessions.

[rfuchs]

https://github.com/sipwise/rtpengine/actions/runs/3887601866/jobs/6634052992 and https://github.com/sipwise/rtpengine/actions/runs/3887601866/jobs/6634052815 are still failing

Not sure if debhelper is colliding with the make install targets

[dilyanpalauzov]

It fails because kernel-module/xt_RTPENGINE.ko is not built on make by default (without calling make -C kernel-module). It is part of the .DEFAULT recipe, but not of the all recipe.

make -C iptables-extension install
make[2]: Entering directory '/github/workspace/iptables-extension'
install -D libxt_RTPENGINE.so /github/workspace/debian/tmp/usr/lib/x86_64-linux-gnu/xtables/libxt_RTPENGINE.so
make[2]: Leaving directory '/github/workspace/iptables-extension'
make -C kernel-module install
make[2]: Entering directory '/github/workspace/kernel-module'
install -D xt_RTPENGINE.ko /github/workspace/debian/tmp/lib/modules/5.15.0-1024-azure/updates/xt_RTPENGINE.ko
install: cannot stat 'xt_RTPENGINE.ko': No such file or directory
make[2]: *** [Makefile:43: install] Error 1
make[2]: Leaving directory '/github/workspace/kernel-module'
make[1]: *** [Makefile:50: install] Error 2
make[1]: Leaving directory '/github/workspace'
dh_auto_install: error: make -j2 install DESTDIR=/github/workspace/debian/tmp AM_UPDATE_INFO_DIR=no "INSTALL=install --strip-program=true" returned exit code 2
make: *** [debian/rules:31: binary] Error 25
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2