[xml] Makefile, configure.js and DSP comments

[<oliverst online de>]

- DocBook should removed from the configure.js
- in the configure.js an additional kind of static build should be added
("dll" using LIBXML_STATIC_FOR_DLL)
- it seems like the LIBXML_STATIC define is missing in the dsp coming
with the libxml2 for the static compile
- in the Makefile.am andMakefile.in in the start folder and the MSVC,
BCB and VMS project files the "DOCBparser.c" is still present (mostly
associated with WITH_TRIO_SOURCES)