feature: add support for runningregex to set RUNNING state accordingly #1446
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The runningregex option can be used to only set the RUNNING state of a process, if the child process is considered to be running. This is done by looking into the stdout and check whether an expected output has been recognized. If so, the process will set to running state. This requires the child process to create the corresponding output, otherwise the RUNNING state is never reached.
Closes #1445
This option can be used by adding runningregex to the config of a program.
In the following minimal example, the running state will be set when "Hello World!" is printed.
[program:hello_world]
command = /bin/sh -c "sleep 10 && echo Hello World! && sleep 10"
runningregex=Hello
stdout_logfile=./log/hello_world.log