[Libguestfs] [PATCH nbdkit 0/4] tests: Move common functions into tests/functions.sh

[Richard W.M. Jones]

Combine much common code into tests/functions.sh.

Patch 1: Preparation for patch 3.

Patch 2: Fix a long-standing bug in how man pages links are generated.

Patch 3: Common code for iterating a test function over every plugin.

Patch 4: Common code for starting nbdkit in a test and waiting for the
         PID file to appear.  This is the largest and most complex of
         the patches but is basically repetitive.

Rich.