Changes in version 1.7:

When compressing on a 32 bit system, plzip now tries to limit the memory
use to under 2.22 GiB (4 worker threads at level -9) by reducing the
number of threads below the system's default.

The option '--loose-trailing', has been added.

The test used by plzip to discriminate trailing data from a corrupt
header in multimember regular (seekable) files has been improved to a
Hamming distance (HD) of 3, and the 3 bit flips must happen in different
magic bytes for the test to fail. As a consequence some kinds of files
no longer can be appended to a lzip file as trailing data unless the
'--loose-trailing' option is used when decompressing.
Lzlib 1.10 or newer is required for this test to work on non-seekable
files.
Lziprecover can be used to remove conflicting trailing data from a file.

The 'bits/byte' ratio has been replaced with the inverse compression
ratio in the output.

The progress of decompression is now shown at verbosity level 2 (-vv) or
higher.

Progress of (de)compression is only shown if stderr is a terminal.

A second '.lz' extension is no longer added to the argument of '-o' if
it already ends in '.lz' or '.tlz'.

The dictionary size is now shown at verbosity level 4 (-vvvv) when
decompressing or testing.

The new chapter "Meaning of plzip's output", and a block diagram of
plzip have been added to the manual.