Log Message:
update to 2.6.17

This release includes a lot of fixes and improvement to existing
features plus a few new APIs:

* build fixes:
 - Windows
 - warnings removal (William Brack)
 - maintainer-clean dependency(William)
 - build in a different directory (William)
 - fixing --with-minimum configure build (William)
 - BeOS build (Marcin Konicki)
 - compilation on AIX (Dan McNichol)
* bug fixes:
 - xmlTextReaderHasAttributes (Rob Richards)
 - xmlCtxtReadFile() to use the catalog(s)
 - loop on output (William Brack)
 - XPath memory leak
 - ID deallocation problem (Steve Shepard)
 - debugDumpNode crash (William)
 - warning not using error callback (William)
 - xmlStopParser bug (William)
 - UTF-16 with BOM on DTDs (William)
 - namespace bug on empty elements in push mode (Rob Richards)
 - line and col computations fixups (Aleksey Sanin)
 - xmlURIEscape fix (William)
 - xmlXPathErr on bad range (William)
 - patterns with too many steps
 - bug in RNG choice optimization
 - line number sometimes missing.
* improvements:
 - XSD Schemas (Kasimier Buchcik)
 - xmlUTF8Strpos speedup (William)
 - XSD error reports (Kasimier Buchcik)
* new APIs:
 - added xmlDictExists()
 - GetLineNumber and GetColumnNumber for the xmlReader (Aleksey Sanin)
 - Dynamic Shared Libraries APIs (mostly Joel Reed)
 - error extraction API from regexps
 - new XMLSave option for format (Phil Shafer)
* documentation:
 - site improvement (John Fleck), FAQ entries (William).