Remove extraneous word.

PR:		docs/187279
Submitted by:	Vladimir Romanov <blueboar_2@rambler.ru>
Update the slow-porting chapter.

Sponsored by:	Absolight
Last merge shuffle in prep for technical review.
Next few commits will clarify the info and check the order
in which it is presented.

Sponsored by: iXsystems
Clarify introduction.

Sponsored by: iXsystems
- Rewrite text wrapping for HTML line numbering so that empty lines
  are not lost

Reported by:	wblock
Clarify the procedure for setting up the PXE Environment.
Comment out some sections which probably no longer apply.

Sponsored by: iXsystems
Editorial pass through Configuring DHCP section.

Sponsored by: iXsystems
Finish editorial review of this chapter.
Next commit will close PR62412.

Sponsored by: iXsystems
Document __FreeBSD_version values 902507 and 1000703.
White space fix only. Translators can ignore.

Sponsored by: iXsystems
White space fix only. Translators can ignore.

Sponsored by: iXsystems
Fix grammo.

Sponsored by: iXsystems
Initial shuffle in prep for technical review of this chapter.
More commits to come.

Sponsored by: iXsystems
Editorial pass through Routing Basics.
Add name to table.

Sponsored by: iXsystems
Finish editorial pass through Routing chapter.
The section on Multicast needs more content and a working
example.

Sponsored by: iXsystems
White space fix only. Translators can ignore.

Sponsored by: iXsystems
- Merge the following from the English version:

	r43782 -> r43794	head/ja_JP.eucJP/books/handbook/cutting-edge/chapter.xml
Update my (dbn) key to 4096/RSA, signed by old key.
Update my key.
Add my "dbn@freebsd.net" UID to my public key.