The logic for setting the options for dblatex on the various languages
wasn't correct. The default option need to be set to an empty string
which is expanded with the additional needed options later, otherwise
previously added options won't get forgotten within the configuration
run for the next language.
Gbp-Pq: Topic fixes
Gbp-Pq: Name Fix-dblatex-options-within-cmake-file.patch
add field 'revdate' to asciidoc files of documentation
For reproducibility we need to set up a date that's not depending on the
current time and timezone. We add a extra asciidoc control field
'revdate' and expand the variable behind that while building the package
with the date from the changelog file.
Gbp-Pq: Topic reproducibility
Gbp-Pq: Name add-field-revdate-to-asciidoc-files-of-documentation.patch