[SECURITY] Fedora 21 Update: librsync-1.0.0-1.fc21

librsync implements the “rsync” algorithm, which allows remote differencing of binary files. librsync computes a delta relative to a file’s checksum, so the two files need not both be present to generate a delta. This library was previously known as libhsync up to version 0.9.0. The current version of this package does not implement the rsync network protocol and uses a delta format slightly more efficient than and incompatible with rsync 2.4.6.