Hi,

This improves the mandocdb(8) catpage heuristic to, well, more or less 
as good as it's going to get.  It now reads multiple lines into a 
buffer, joining the lines with a space.

While here, I removed the 70-character limit.  I recoded this into 
apropos.c's and whatis.c's printf(3) statements.  We should really 
consider a better way: if not 70-char, to the COLUMN limit?

Lastly, I added an extra man(7) heuristic for separating names and 
descriptions, namely the \-\- I observed in some POD manuals.  This 
cleans up "apropos -s 3p ~.*" quite a lot.

Thoughts?

Kristaps