[Libguestfs] [PATCH nbdkit v2 0/4] Add -D nbdkit.environ=1, Windows fixes and quoting issues

[Richard W.M. Jones]

This grew a bit from last time ...

The basic change to allow dumping the environment is the same, except
I enabled this for Windows (and checked that it does in fact work --
Windows has environment variables, who knew?)

The second patch fixes a problem I noticed while testing the above on
Windows.

The third & fourth patches escape debug strings similarly to C
strings, so for example if a debug string contains '\n' then it will
be printed with ...\n... and not (as currently) break the debug
message across multiple lines.  Other non-printable characters are
handled in the obvious way too.

Rich.