Merge branch 'ma/asciidoctor-build-fixes'

A topic to optionally build with meson, which has graduated to 'master' recently, broke Documentation pipeline with asciidoctor for the normal Makefile build as well as meson-based one, which have been corrected. * ma/asciidoctor-build-fixes: asciidoctor-extensions.rb.in: inject GIT_DATE asciidoctor-extensions.rb.in: add missing word asciidoctor-extensions.rb.in: delete existing <refmiscinfo/>