Move more stuff from src/s to configure

Move more stuff from src/s to configure

* configure.ac (PREFER_VSUSP, RUN_TIME_REMAP, SETPGRP_RELEASES_CTTY)
(TAB3, TABDLY, RUN_TIME_REMAP, XOS_NEEDS_TIME_H): Move here from src/s.

* src/s/bsd-common.h, src/s/darwin.h: Move TAB3 to configure.

* src/s/hpux10-20.h, src/s/sol2-6.h: Move XOS_NEEDS_TIME_H to configure.

* src/s/irix6-5.h (SETPGRP_RELEASES_CTTY, PREFER_VSUSP):
* src/s/hpux10-20.h (RUN_TIME_REMAP):
* src/s/bsd-common.h (TABDLY): Move to configure.