archives.pg.org font changes

Hi,

I've been trying to enable the archives pages to pass the HTML
validation as requested by Magnus and Stefan.  In doing so I've made
quite a few changes to the HTML code and programs, and some intermediate
results have been, to put it mildly, less than ideal :-)

They should be a bit better now.  Please have a look around and let me
know your opinions.  Keep in mind that I'm looking for comments on font
sizes, font faces, etc.  One particular very visible change is that the
mail bodies are all in monotype face.

-- 
Alvaro Herrera                                http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support