Fix multi-paragraph list items in OPTIONS section

Fix multi-paragraph list items in OPTIONS section

This patch makes the html docs right, makes the asciidoc docs a bit odd
but consistent with what is there already, and makes the manpages look
OK using docbook-xsl 1.68, but miss a paragraph separator when using 1.69.

For the manpages, current is like

       -A <author_file>
              Read a file with lines on the form

              username = User's Full Name <email@addr.es>

              and use "User's Full Name <email@addr.es>" as the GIT

With this patch, docbook-xsl v1.68 looks like

       -A <author_file>
              Read a file with lines on the form

                      username = User's Full Name <email@addr.es>

              and use "User's Full Name <email@addr.es>" as the GIT author and

while docbook-xsl v1.69 becomes

       -A <author_file>
              Read a file with lines on the form

                        username = User's Full Name <email@addr.es>
              and use "User's Full Name <email@addr.es>" as the GIT author and

The extra indentation is to keep the v1.69 manpage looking sane.