LinuxServer Changes:
Rebase to Alpine 3.19.
tvheadend Changes:
Use safer htsmsg_add_str2 when copying de->de_directory
de->de_directory may be null. htsmsg_add_str passes str unchecked to underlying strlen function. __strlen_avx2 will segfault if str is null.
htsmsg_add_str2 checks the value of args before passing them to htsmsg_add_str, which should prevent this.
Fixes #1712