Merge branch 'cj/doc-format'

* cj/doc-format:
  Documentation: use "spurious .sp" XSLT if DOCBOOK_SUPPRESS_SP is set
  Documentation: option to render literal text as bold for manpages
  Documentation: asciidoc.conf: fix verse block with block titles
  Documentation: asciidoc.conf: always use <literallayout> for [blocktext]
  Documentation: move "spurious .sp" code into manpage-base.xsl
  Documentation: move quieting params into manpage-base.xsl
  Documentation: rename docbook-xsl-172 attribute to git-asciidoc-no-roff
  Documentation: use parametrized manpage-base.xsl with manpage-{1.72,normal}.xsl
  Documentation: move callouts.xsl to manpage-{base,normal}.xsl
  Documentation/Makefile: break up texi pipeline
  Documentation/Makefile: make most operations "quiet"

diff --cc Documentation/RelNotes-1.6.3.txt
Simple merge