Ticket #3748: add support for ksh in subshell #172

Job	Run time
call-build-alpine / build-alpine	2m 10s
call-build-fedora / build-fedora	1m 50s
call-build-macos / build-macos	1m 31s
call-build-freebsd / build-freebsd	3m 3s
call-build-solaris / build-solaris	5m 27s
call-build-ubuntu / build-ubuntu	4m 19s
	18m 20s

Provide feedback