additional section of defines in config.h
enable ADJSPLIT unconditionally
Revert "kill #ifdef ASTRAL_ESCAPE"

This reverts commit f6a76753f75a55fd44a9185e9b6298bd9b73338b - as it was unfinished (covered only .h files).
move ASTRAL_ESCAPE to section 6 in config.h
enable SEDUCE unconditionally