Added GRUB docs, Added netboot.xyz

boot/grub/persistent/docs/02_naming_convention

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+2 Naming convention
+*******************
+
+The device syntax used in GRUB is a wee bit different from what you may
+have seen before in your operating system(s), and you need to know it so
+that you can specify a drive/partition.
+
+   Look at the following examples and explanations:
+
+     (fd0)
+
+   First of all, GRUB requires that the device name be enclosed with '('
+and ')'.  The 'fd' part means that it is a floppy disk.  The number '0'
+is the drive number, which is counted from _zero_.  This expression
+means that GRUB will use the whole floppy disk.
+
+     (hd0,msdos2)
+
+   Here, 'hd' means it is a hard disk drive.  The first integer '0'
+indicates the drive number, that is, the first hard disk, the string
+'msdos' indicates the partition scheme, while the second integer, '2',
+indicates the partition number (or the PC slice number in the BSD
+terminology).  The partition numbers are counted from _one_, not from
+zero (as was the case in previous versions of GRUB). This expression
+means the second partition of the first hard disk drive.  In this case,
+GRUB uses one partition of the disk, instead of the whole disk.
+
+     (hd0,msdos5)
+
+   This specifies the first "extended partition" of the first hard disk
+drive.  Note that the partition numbers for extended partitions are
+counted from '5', regardless of the actual number of primary partitions
+on your hard disk.
+
+     (hd1,msdos1,bsd1)
+
+   This means the BSD 'a' partition on first PC slice number of the
+second hard disk.
+
+   Of course, to actually access the disks or partitions with GRUB, you
+need to use the device specification in a command, like 'set root=(fd0)'
+or 'parttool (hd0,msdos3) hidden-'.  To help you find out which number
+specifies a partition you want, the GRUB command-line (*note
+Command-line interface::) options have argument completion.  This means
+that, for example, you only need to type
+
+     set root=(
+
+   followed by a <TAB>, and GRUB will display the list of drives,
+partitions, or file names.  So it should be quite easy to determine the
+name of your target partition, even with minimal knowledge of the
+syntax.
+
+   Note that GRUB does _not_ distinguish IDE from SCSI - it simply
+counts the drive numbers from zero, regardless of their type.  Normally,
+any IDE drive number is less than any SCSI drive number, although that
+is not true if you change the boot sequence by swapping IDE and SCSI
+drives in your BIOS.
+
+   Now the question is, how to specify a file?  Again, consider an
+example:
+
+     (hd0,msdos1)/vmlinuz
+
+   This specifies the file named 'vmlinuz', found on the first partition
+of the first hard disk drive.  Note that the argument completion works
+with file names, too.
+
+   That was easy, admit it.  Now read the next chapter, to find out how
+to actually install GRUB on your drive.
+