Why is it that most Unix systems, and Debian Linux boxes, have a printcap(5) manpage, but this is missing from my Fedora boxes? Is this in another package somewhere, or is it simply missing?
Because Fedora has switched the default print system from LPRng to CUPS, and CUPS doesn't need or refer to a printcap (although it can generate one for compatibility with certain odd programs that expect to find one).