doc/ & txt/: Spelling fix

Also add octal note.

Reported-By: Ady <ady-sf@hotmail.com>
Signed-off-by: Gene Cumm <gene.cumm@gmail.com>
core: we only need one reset_idle()

We don't need both an assembly version of reset_idle and an
implementation in C. Having these two functions has led to a bug where
we may idle with interrupts disabled because an 'sti' is only performed
in the assembly version. This lead to a hang waiting for user input.

Cc: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Merge branch 'doc-for-mfleming' of git://github.com/geneC/syslinux into elflink

Pull doc/ and txt/ spelling corrections from Gene Cumm,

* 'doc-for-mfleming' of git://github.com/geneC/syslinux:
  doc/ & txt/: Spelling fix