Pull up revision 1.31, requested by maxv in #1209:

Prevent a user-triggerable kmem_alloc(0).
Ticket #1209
Pull up following revision(s) (requested by tsutsui in ticket #1210):
	usr.sbin/sysinst/arch/atari/msg.md.de: revision 1.2
	usr.sbin/sysinst/arch/atari/msg.md.en: revision 1.2
	usr.sbin/sysinst/arch/atari/msg.md.es: revision 1.2
Terminate messages with a newline so that dialog box won't overwrite messages.
Pull up following revision(s) (requested by tsutsui in ticket #1211):
	sys/arch/atari/stand/bootxx/bootxx.c: revision 1.16
Expand heap to 64KB so that bootxx can load bootxxx from 32KB blocksize ffs.
Tested on TT030 with 32GB SSD via SATA->IDE->SCSI converters.
Pull up following revision(s) (requested by uwe in ticket #1212):
	sys/dev/ic/rtl8169.c: revision 1.142
RealTek 8139C+ incorrectly identifies UDP checksum 0xffff as bad.
Force software recalculation of UDP checksum if bad checksum is
reported by the hardware.
Tickets #1210-#1212