* HRULE: Add a PREPRINTFN for horizontal rules
Looks better in plaintext files
* GITFNS, COMPAREDIRECTORIES: Group earler/later in separate segments
GIT-CDBROWSER-SEPARATE-DIRECTIONS defaults to T
* FILEIO: INITVARS rather than VARS for FILING.TYPES
To avoid contamination with values from other files (like LAFITE)
* FILEPKG: SEPRCASE in EDITCALLERS includes comma and quote even if no DWIMIFYCOMPLFG
Also seprate the caseinsensitive UPPERCASEARRAY from the SEPRCASE array
* IOCHAR: Open code the call to \INCCODE.EOLC
About a 30% speed up in the slow (casearray/skip) case. Eventually macros should be defined for the externalformat interface functions, for now it is nice to be able to trace/break them.
* EXTERNALFORMAT: a little bit of cleanup
particularly around EOLC
