MFbed: Minor update to the German documentation set.

doc/de_DE.ISO8859-1/books/faq/book.sgml 1.598 -> 1.560
doc/de_DE.ISO8859-1/books/handbook/install/chapter.sgml 1.360 -> 1.361
doc/de_DE.ISO8859-1/books/handbook/kernelconfig/chapter.sgml 1.88 -> 1.90
doc/de_DE.ISO8859-1/books/handbook/ports/chapter.sgml 1.265 -> 1.267

Obtained from:  The FreeBSD German Documentation Project.