Log Message:
Bump PKGREVISION: use SPECIAL_PERMS to install Eterm setuid root and change ==
NetBSD to != SunOS, list USE_MMX in BUILD_DEFS only if it's really enabled,
misc cleanups (whitespace, etc.)

XXX: If installed setuid root on Solaris, pseudo-tty is owned by root,
     and it's not possible to resume a screen session as a normal user.
     (this behaviour should be reviewed again, since this workaround
     is 2 years and several version updates old.)