filelog: add the ability to report the user facing name
This will be used by lfs, but is probably generally useful. There are various
bits of code that reverse engineer this from the index or data file names, but
it seems better to just store it. Especially if there's experimenting with
backing storage other than revlog.
{
// Enforcing
"eqeqeq" : true, // true: Require triple equals (===) for comparison
"forin" : true, // true: Require filtering for..in loops with obj.hasOwnProperty()
"freeze" : true, // true: prohibits overwriting prototypes of native objects such as Array, Date etc.
"nonbsp" : true, // true: Prohibit "non-breaking whitespace" characters.
"undef" : true, // true: Require all non-global variables to be declared (prevents global leaks)
// Environments
"browser" : true // Web Browser (window, document, etc)
}