- QA: Reformat
- Fix ClassLoader::registerPath() to also support XARs in XARs
# Part 1: is_file() checks for mode & 0100000, so return 0100644 in XAR stream wrapper
# Part 2: No longer call realpath() inside registerPath(), cannot resolve xar://...
# Part 3: Change ArchiveClassLoader::instanceFor() to not expand xar://
# See issue #259