Update to r41817:
Woops, this is in the 'Changes from the First Edition' section, not a
generic introduction.

Submitted by:	Bjoern Heidotting
Obtained from:	The FreeBSD German Documentation Project


git-svn-id: svn+ssh://svn.freebsd.org/doc/head@45645 c2e8774f-c49f-e111-b436-862b2bbc8956