- Raise version to 1.79.2.2
Integrate latest changes from assembly/assemble.xsl and
assembly/effectivity.xsl
- Remove docbook-xsl-1.79.2-assembly-assemble.xsl.patch
We copy the two files directly.

These two files contains the following overall changes:
- Fix #254: Pass structure/@xml:lang to result doc
- Support filterin/filterout elements
- Fix problem with resourceref to another structure in assemblies
- fix #28 assemble.xsl: imagedata filerefs in assembled output
document may be incorrect
- Fix #27 to allow merge from resource of titles not inside info
because they are equivalent to titles inside info. Also fixe
a couple of other problems noticed during testing.

For details, see the upstream Git repo and run:
$ git diff release/1.79.2..master -- \
xsl/assembly/assemble.xsl xsl/assembly/effectivity.xsl