v5.2.13
Build system fixes
liblzma: Fix warnings from -Wsign-conversion.
liblzma: Avoid null pointer + 0 (undefined behavior in C).
liblzma: Make the use of lzma_allocator const-correct.
Rename unaligned_read32ne to read32ne, and similarly for the others.
Put the interesting parts of XZ Utils into the public domain. Some minor documentation cleanups were made at the same time.
liblzma: Avoid multiple definitions of lzma_coder structures.
liblzma: Omit an unneeded array from the x86 filter