Fix SERIAL directive in docs

Signed-off-by: Gene Cumm <gene.cumm@gmail.com>
doc/syslinux.txt: grammar

Reported-by: Ady <ady-sf@hotmail.com>
Signed-off-by: Gene Cumm <gene.cumm@gmail.com>
txt/syslinux.cfg.txt: Add SYSAPPEND

Signed-off-by: Gene Cumm <gene.cumm@gmail.com>
txt/syslinux.cfg.txt: Add SENDCOOKIES, example config

Signed-off-by: Gene Cumm <gene.cumm@gmail.com>
txt/syslinux-cli.txt: Path rules

Signed-off-by: Gene Cumm <gene.cumm@gmail.com>
txt/syslinux.txt: synopsis, extlinux.sys, wrap long command

Add -v/--version to synopsis; add note on extlinux.sys from old
versions; Wrap altmbr command for cleaner manpage

Signed-off-by: Gene Cumm <gene.cumm@gmail.com>
txt/syslinux.cfg.txt: Updates

DEFAULT often references a LABEL; TIMEOUT action affected by UI.
IPAPPEND/SYSAPPEND: wrap SYSAPPEND; notes on mask values 2,1.
TIMEOUT-related clarifications
SERIAL is sticky
PATH updated for 5.10-next with notes

Signed-off-by: Gene Cumm <gene.cumm@gmail.com>
txt/: Add common file for derivatives

Signed-off-by: Gene Cumm <gene.cumm@gmail.com>
txt/Makefile: order-only prerequisite

No need to rebuild when the directory's timestamp is updated.

Signed-off-by: Gene Cumm <gene.cumm@gmail.com>
txt/syslinux-cli.txt: Version on Ctrl-N

Only on some versions.

Signed-off-by: Gene Cumm <gene.cumm@gmail.com>
txt/: Add isolinux.txt, pxelinux.txt

Reformatted from previous in doc/.  Reflow to try to be more
manpage-like and put more commonly used information on the top.

Signed-off-by: Gene Cumm <gene.cumm@gmail.com>
txt/Makefile: add isolinux.txt, pxelinux.txt

Signed-off-by: Gene Cumm <gene.cumm@gmail.com>
txt/syslinux.txt: rewrap long command

Signed-off-by: Gene Cumm <gene.cumm@gmail.com>
menu.c32: Fix SYSAPPEND

Using the SYSAPPEND directive would examine "D" instead of the
value after the directive.  Also allows a 1-step switch to strtol()

Signed-off-by: Gene Cumm <gene.cumm@gmail.com>
Merge branch 'doc-for-mfleming' of git://github.com/geneC/syslinux into elflink

Pull txt/ and doc/ updates from Gene Cumm,

* 'doc-for-mfleming' of git://github.com/geneC/syslinux:
  txt/syslinux.txt: rewrap long command
  txt/Makefile: add isolinux.txt, pxelinux.txt
  txt/: Add isolinux.txt, pxelinux.txt
  txt/syslinux-cli.txt: Version on Ctrl-N
  txt/Makefile: order-only prerequisite
  txt/: Add common file for derivatives
  txt/syslinux.cfg.txt: Updates
  txt/syslinux.txt: synopsis, extlinux.sys, wrap long command
  txt/syslinux-cli.txt: Path rules
  txt/syslinux.cfg.txt: Add SENDCOOKIES, example config
  txt/syslinux.cfg.txt: Add SYSAPPEND
  doc/syslinux.txt: grammar
  Fix SERIAL directive in docs
Merge branch 'menu-ipappend-1-for-mfleming' of git://github.com/geneC/syslinux into elflink

Pull a fix for the SYSAPPEND directive from Gene Cumm,

* 'menu-ipappend-1-for-mfleming' of git://github.com/geneC/syslinux:
  menu.c32: Fix SYSAPPEND