MFbed: Content update and various fixes
books/handbook/advanced-networking/chapter.sgml fixes only
books/handbook/basics/chapter.sgml fixes only
books/handbook/ports/chapter.sgml fixes only
books/handbook/disks/chapter.sgml fixes only
books/handbook/linuxemu/chapter.sgml fixes only
books/handbook/serialcomms/chapter.sgml fixes only
books/handbook/mail/chapter.sgml fixes only
books/handbook/users/chapter.sgml fixes only
books/handbook/ppp-and-slip/chapter.sgml fixes only
books/handbook/cutting-edge/chapter.sgml 1.178 -> 1.180
books/handbook/mirrors/chapter.sgml 1.266 -> 1.269
books/handbook/security/chapter.sgml 1.137 -> 1.139
books/handbook/config/chapter.sgml 1.81 -> 1.85
books/handbook/eresources/chapter.sgml 1.106 -> 1.107
books/handbook/pgpkeys/chapter.sgml 1.179 -> 1.185