boostbook.jam:

  - Factor out XSLT processing rules
  - Add "tests" rule to build testcases and Jamfiles

doxygen.jam:
  - Use Doxygen as-is, without the monolithic XML file patch

xsltproc.jam:
  - xsltproc XSLT toolset

user-config.jam:
  - add "using xsltproc"


[SVN r18241]

tools/build

@@ -1 +1 @@
-Subproject commit 45cd7678718f6d19971d80eb16d5898999ad2ff9
+Subproject commit ff4e39fb667139c80934fb4b6bf62f2c4271b30d