vax610_sysdev.c - Generalized the boot parsing.

The supported boot options now are:
	B XQ			; Network boot
	B XQA			; equivalent
	B XQA0			; equivalent
	B RQ			; Boot RQ0
	B RQ0			; equivalent
	B DUA			; equivalent
	B DUA0			; equivalent
	B RQn			; Boot RQn
	B DUAn			; equivalent
	B DUn			; equivalent
	B 			; Boot using boot ROM device search

Also the R5 boot options can be specified either before or after the device name and with or without the R5:

For example:
	B /R5:1 XQ
	B /1 XQ
	B XQ /R5:1
	B XQ/1
are all equivalent
1 file changed