rebase to upstream v1.17

stald/utils: Space, lines and voids clenaups
stalld: Add an option to easily set stalld as SCHED_DEADLINE
stalld: Comments cleanup
src/utils: Comments cleanup
src/throttling: Comments cleanup
src/stalld.h Comments cleanup

stalld: Fix incorrect open() return value checks
throttling: Always null terminate sched_rt_runtime_us output
stalld: Remove unreachable statement in detect_task_format()
tests: Fix uninitialized value action.sa_mask
utils: Bail if malloc() returns null in parse_cpu_list()
stalld: Use correct format specifier for long types

stalld: Coding style cleanup
stalld: spaces in place of <TAB>
throttling: Use RT_RUNTIME_PATH in rt_throttling_is_off()
throttling: Check open() on turn_off_rt_throttling
throttling: Adjust variables in restore_rt_throttling()
stalld.c: utils.c: Remove complex assignments from variable declarations
stalld.h: Define MAX_PATH/DIR_PATH/FILE_NAME and use them
stalld: Adjust variables in parse_old_task_format()
utils.c: Use MAX_PATH for pidfile
stalld.c: Remove variable declaration from the middle of the function
stalld: Respect -l option in single threaded mode (1983100)
utils: s/try_to_open_file/check_file_exists/
utils: use check_file_exists in setup_hr_tick()
utils: Check for the new sched_features path

stalld: Fix log message on boost_cpu_starving_vector()
stalld: Add the overload control to the single-threaded mode
stalld: Add the adaptive mode option
stalld: Use the last mode set in the cmdline
stalld: Fallback to the adaptive mode if force_fifo is selected
stalld: Make single-threaded mode the default one (1920041)
stalld.service: Always restart stalld on exit
utils.c: Fail if user is not root
utils.c: Make the path to sched_debug path dynamic (1977663)

stalld.8: fix diff cruft left in manpage source
stalld.c: clean up handling of nr_running
stalld.c: remove duplicate parameter to fill_waiting_task() (1934582)
stalld.service: Run stalld as sched_fifo via systemd
stalld: Add error handling in get_cpu_idle_time() (1966259)
packaging: clean up Makefiles and rpm specfile (1972806)
stalld: Always print current function for info messages
stalld: Always print current function for warn messages
stalld: Always print current function for die messages
utils: change PATHMAX to 4096 (1934581)

redhat/stalld.spec: pick up gating test version for changelog
utils.c: set daemon umask to restrict global write/execute (1934586)
hardening fixes from coverity scan (1934590)

utils: Fix bounds check on cpu and end_cpu variables
stalld: Support denylisting of tasks in stalld
src/utils: use right argument for warning printf

update to pick up latest gating test

Set starvation threshold default to 30 seconds
rework read buffer allocation to properly find page size
Add the -g/--granularity option
Change the default granularity to five seconds
Implement idle detection
Implement the single-threaded mode
Add HRTICK_DL support

Fix Readiness Protocol Mismatch with systemd
test01: update to use buildin atomic operations
test01: add throttling check

rework detect_task_format and buffer_size logic
make CFLAGS for local compile match rpmbuild CFLAGS

add systemd handling of RT Throttling

fix signal handler to catch SIGTERM

stalld: Set rt_runtime to -1 before trying the SCHED_DEADLINE
Fix incorrect recursion of specfile version field

Readme: Add information about repositories
Add version management and version option
create doc and scripts directory and add info on releases