MFbed: Update the German documentation set.

books/fdp-primer/sgml-markup/chapter.sgml 1.69 -> 1.73
books/fdp-primer/sgml-primer/chapter.sgml 1.42 -> 1.44
books/fdp-primer/translations/chapter.sgml 1.26 -> 1.29
books/fdp-primer/writing-style/chapter.sgml 1.47 -> 1.48
books/handbook/basics/chapter.sgml 1.138 -> 1.139
books/handbook/boot/chapter.sgml 1.59 -> 1.60
books/handbook/cutting-edge/chapter.sgml 1.217 -> 1.219 + fixes [X]
books/handbook/mail/chapter.sgml 1.129 -> 1.131
books/handbook/mirrors/chapter.sgml 1.386 -> 1.387
books/handbook/multimedia/chapter.sgml fixes only
books/handbook/pgpkeys/chapter.sgml 1.270 -> 1.272
books/handbook/preface/preface.sgml 1.29 -> 1.30
books/handbook/printing/chapter.sgml 1.93 -> 1.94 + translation finished
books/handbook/security/chapter.sgml fixes only
books/handbook/x11/chapter.sgml 1.166 -> 1.167

• - submitted by Fabian Keil (freebsd-listen at fabiankeil.de)

Obtained from: The FreeBSD German Documentation Project.