Describe the feature you'd like
Currently we support interrupt (^C), eof (^D) and suspend (^Z) but there are others control sequences and signals that we could send. SIGTERM and SIGKILL are the ones that come to my mind.

However sending signals may be tricky/dangerous because if the control-sequence/signal is received by the shell, it may close it by accident.

So we need to document what alternatives we have in case +stop-signal is not enough.