Sync-to-go: font/..
This commit actually finishs porting, since we yet hard-coded the
device etc. names (e.g., grotty not @L_D_TTY@), but i'm too lazy
to squash and rebase that separately.
What else? Manually sorted the PS textmap and adjusted
symbolchars to match GNU roff (basically stuff has been moved from
the latter to the former), compared the output of the then
generated symbolmap with current GNU roff.
Simply took all fonts from GNU roff, since the result should be
identical to what we can generate once S-roff builds and runs.
What is text and what is a symbol, including all the Unicode stuff
will later be revisited according to the output of my S-CText.