Re: [Libguestfs] [PATCH nbdkit 1/2] log: Use strict shell quoting for every parameter displayed in the log file.

This is not fully backwards compatible, although the changes are minor: * Lists returned by ListExports and Extents use the array format that can be parsed by bash, eg: Extents id=1 extents=(0x0 0x8000 "hole,zero" 0x8000 0x8000 "") return=0 * Errors are returned as separate error= parameters, and simplified, eg: ...Read id=1 return=-1 error=EINVAL * Strings are quoted properly in all circumstances. This commit also updates the documentation and adds more tests.