Implement mdoc(7)-like output style variant for man(7) documents:
* one instead of three blank lines after the page header;
* one instead of three blank lines before the page footer;
* source instead of title(section) in the lower right corner.
Select this style variant with the undocumented command line option -Omdoc.
In the long run, we hope to unify the ouput of both languages and
to pull this out again, but that requires coordination with groff.
Grudgingly ok and, (as usual,-) more comments requested by kristaps@