v5.2.13
Bump version and soname for 5.2.13
Fix SHA-256 authors.
Fix typos
liblzma: Minor comment edits.
liblzma: Set all values in lzma_lz_encoder to NULL after allocation.
liblzma: Improve lzma encoder init function consistency.
liblzma: Fix compilation of price_tablegen.c.
liblzma: Omit an unneeded array from the x86 filter
liblzma: Add Cflags.private to liblzma.pc.in for MSYS2.
liblzma: Vaccinate against an ill patch from RHEL/CentOS 7.
Added public domain notice into a few files.