GitLab

* s/irix3-3.h:
* s/irix4-0.h:
* s/386-ix.h:
* s/domain.h:
* s/hpux9-x11r4.h:
* s/hpux9shxr4.h: Remove files for systems no longer supported.

* sysdep.c: Remove code containing references to symbols defined
by unsupported systems.