Merge branch 'jk/execv-dashed-external' into maint

Typing ^C to pager, which usually does not kill it, killed Git and took the pager down as a collateral damage in certain process-tree structure. This has been fixed. * jk/execv-dashed-external: execv_dashed_external: wait for child on signal death execv_dashed_external: stop exiting with negative code execv_dashed_external: use child_process struct