MFde: Update the German documentation set.

doc/de_DE.ISO8859-1/books/faq/book.sgml 1.922 -> 1.955 [X]
doc/de_DE.ISO8859-1/books/handbook/x11/chapter.sgml fixes only [XX]

Obtained from: The FreeBSD German Documentation Project

• Contributed by: Benedict Reuschling (benedict ett reuschling dott org)

[XX] Found by: Daniel Seuffert