Applied Phil Endecott's patch, which adds support for additional SGR

Applied Phil Endecott's patch, which adds support for additional SGR
escape sequences and fixes a few bugs -- "top" now works because the
cursor will remain on the same line after outputting a full line of
text, instead of jumping to the next line as it was doing before.
Phil Endocott's email: phil_achbq_endecott@chezphil.org