Add new template variables $adjusting$ and $hyphenate$ for default.man.

$adjusting$ takes the values "l", "r", "c" or "b",
which adjusts text to left, right, center or both margins respectively.

$hyphenate$ is set to "true" by default,
setting it to "false" will turn off hyphenation.

* default.man: Add new variables $adjusting$ and $hyphenate$.

default.man

@@ -1,6 +1,14 @@
 $if(has-tables)$
 .\"t
 $endif$
+$if(adjusting)$
+.ad $adjusting$
+$endif$
+$if(hyphenate)$
+.hy
+$else$
+.nh
+$endif$
 .TH "$title$" "$section$" "$date$" "$footer$" "$header$"
 $for(header-includes)$
 $header-includes$