* tests: Run IPC with use-filesystem-sockets active
Provide an LD_PRELOAD library that simulates the presence
of /etc/libqb/use-filesystem-sockets so that we can test
that functionality without actually having the file on
the system and affecting everything else running on the
box.
* use $() rather than ``
* Cope with spaces in directory names
* Docs: quote DOXYGEN2MAN in Makefile.am rather than configure.ac
