local and remote text fonts

[Scott Tringali]

X resources can usually be qualified by the display name 
(.Xdefaults-hostname), that might be the easiest way.

Tony, instead of specifying different fonts pixels based on screen DPI, 
you can just specify fonts by point size which does the same thing.  Of 
course, that may not give exactly what you want.

Right now we default to a point size, not pixel size, on the theory that 
it will produce a reasonable size no matter what the DPI is.  (Well, 
unless KDE or something has stomped on it.)  But sometimes you want more 
control over it - especially if you're using bitmap fonts where a 
particular pixel size is very important.