[syslinux] PATH directive rules

[Ady]

Hello Syslinux Team,

If I understand correctly (and I should emphasize that condition), 
the lib*.c32 library modules, when required, are initially 
searched-for according to the following (fallback) rules:

1_ Search for the relevant lib*.c32 file(s) in the Current Working 
Directory.
2_ Search for the relevant lib*.c32 file(s) in the directory where 
ldlinux.c32 is located.

Then the lib*.c32 files are searched-for according to the PATH 
directive, as follows:
3_ Search for the relevant lib*.c32 file(s) in the paths indicated by 
the PATH directive, in the same order as they are stated.
4_ Each path used in each PATH directive is appended to the end of 
the list of the searched-for paths previously set.

So, I have several questions.

1_ Am I understanding the PATH rules correctly?
2_ From the user's perspective, are there any differences (or 
different behaviors) between each Syslinux variant regarding the 
above rules?
3_ After fallback rules #1 and #2, and before searching for lib*.c32 
files according to the PATH directive, a possible third fallback rule 
could potentially be: "search for the relevant lib*.c32 file(s) in 
the same directory where the main c32 module (the one that needs the 
c32 library file(s)) resides". Is this addition possible? Would there 
be any disadvantages? Are there any problems in adding this third 
fallback rule, before searching according to the PATH directive?
4_ According to the rules, some of the resulting paths could 
potentially be searched-for more than once. If a specific path was 
already searched-for, is there a situation where it could be 
searched-for again, thus wasting time and resources? Or, instead, is 
this duplicity avoided?

TIA,
Ady.