[RFH] renaming strcmp/strncmp-icase

There are these two functions in dir.c that has only a handful of callers outside:

    int strcmp_icase(const char *a, const char *b);
    int strncmp_icase(const char *a, const char *b, size_t count);

How many of you would think these are about comparing two strings in a case-insensitive way?

If you raised your hand (like I did), you were wrong. These do comparison case-insensitively only on a case-insensitive filesystem, and hence calling it makes sense only for pathnames you grabbed out of the filesystem via readdir() (or the user gave us, intending to name paths).

To avoid confusion, I think they should be renamed to stress the fact that these are about comparing *PATHS*. As I always say, I am bad at naming things and good suggestions are appreciated.

FYI, there are names I thought about and haven't managed to convince myself that they are good.

A good name for the non-n variant may be "compare_paths()", but that is used in "combine-diff.c". "compare_pathnames()" may be a compromise.

However, either of these makes it hard to come up with a corresponding name for the "n" (counted) variant. The best I could do was "compare_pathnames_counted()", but a nice similarity to strcmp()/strncmp() pair is lost.

pathnamecmp()/pathnamencmp() perhaps?

I dunno.