[RFC][Vote] Additional context in pcntl_signal handler

Hi!

The RFC for enhancing pcntl_signal with additional calling context1 is
now in voting phase. Voting open now through July 14.

Implementation PR2 available for review.

Thanks!

Voting has closed, with this RFC passing 15 to 0 (100%).

Thank you all who participated in the discussion and voted!

RM, please merge accordingly for 7.1 availability.