MFde: Update the German Documentation set.

doc/de_DE.ISO8859-1/books/handbook/disks/chapter.sgml 1.296 -> 1.297
doc/de_DE.ISO8859-1/books/handbook/jails/chapter.sgml 1.20 -> 1.21
doc/de_DE.ISO8859-1/books/handbook/multimedia/chapter.sgml 1.94 -> 1.95
doc/de_DE.ISO8859-1/books/handbook/network-servers/chapter.sgml 1.123 -> 1.125
doc/de_DE.ISO8859-1/books/handbook/x11/chapter.sgml 1.202 -> 1.203
doc/de_DE.ISO8859-1/books/porters-handbook/book.sgml Fixes only [X]

• Found by: Rainer Hurling (rhurlin att gwdg dott de)

Obtained from: The FreeBSD German Documentation Project