https://bugzilla.mozilla.org/show_bug.cgi?id=1397928
Was looking into that _POSIX_PATH_MAX/NAME_MAX issue earlier because it didn't make a lot of sense and I was thinking of other approaches besides char arrays, and I wanted to make sure it didn't cause problems after they did it. Turns out that one commit after this was added, Mozilla determined the code I was working on fixing to be dead code as of Firefox 58. I don't know if it's dead code in Pale Moon as well, but given that it compiles fine without it and I can't find any other references to szExeFile in the IPC code, that seems like a safe bet.
Besides, I determined config/pathsub.c already seems to do what this code looks like it's trying to do, and implements the solution of just defining NAME_MAX to 256 and having done with it that I nearly adopted after realizing that even OS/2 and BeOS, let alone Unix/Linux systems, all basically use that value and there's just disagreement on which system header to check for it.
