Log Message:
librsync: updated to 2.3.1

librsync 2.3.1

This is a patch release that adds peformance improvements, updates and tidies \ 
documentation, and fixes two build/test bugs on FreeBSD.

librsync 2.3.0

This is a minor release that adds rs_sig_args() for getting the recommended \ 
signature arguments based on the file size. which is used by rs_sig_file() and \ 
rdiff. This means rdiff by default will use a better block size based on the \ 
file size, and supports using --sum-size=-1 to use the smallest safe sum size \ 
(safe against random collisions, not against crafted hash-collision attacks). It \ 
removes old code that made the default strongsum size 8 when using --hash=md4, \ 
and it now defaults to 16 (the max for md4) for better protection against the \ 
risk of hash collision attacks and corruption. It also includes many code \ 
cleanups and testing improvements, including full C99 compliance. Upgrading from \ 
v2.2.1 is optional.

To generate signatures identical to the previous version's default arguments, \ 
you will need to use --block-size=2048 to select the old default block size. \ 
Also, when using --hash md4 you will need to add --sum-size=8 to select the old \ 
sum-size default when using md4 strongsums.

librsync 2.2.1

This is a patch release that fixes a bug that makes delta operations hang for \ 
files larger than 4GB. Upgrading from v2.2.0 is essential.

librsync 2.2.0

This is a minor release that adds RabinKarp rollsum support as the new \ 
recommended default. This is a much better rolling hash with a much better \ 
distribution and less collisions, particularly for text files and small blocks. \ 
This results in faster delta calculations and a reduced risk of corruption from \ 
hash collisions when using small strongsum sizes. It also includes important \ 
fixes for compiling on/for windows, and some other minor improvements. Upgrading \ 
from v2.1.0 is essential for people compiling for windows, recommended for \ 
people who want a performance increase, and otherwise not urgent.

To generate signatures compatible with previous versions of rdiff you will need \ 
to use the --rollsum rollsum to select the old rollsum algorithm, or for \ 
librsync use the RS_BLAKE2_SIG_MAGIC or RS_MD4_SIG_MAGIC arguments when starting \ 
the signature with rs_sig_begin().

librsync 2.1.0

This is a minor release that exposes a few useful utility functions to \ 
librsync.h previously only used by rdiff. It also introduces proper exporting of \ 
only public symbols in the librsync.h header. The most important fix is for a \ 
memory leak when freeing signatures. Upgrading from v2.0.2 is highly recommended \ 
for people using librsync and experiencing memory leak problems, but otherwise \ 
not urgent.