core: fix memory leak in evaluation of expression when a logical operator ("&&" or "||") is found
doc: remove comment for autogen.sh in tester's guide (command required even for tarball)
doc: replace iteritems() by items() in scripting guide (compatibility with Python 3.x)
doc: fix typos
relay: add error number and string when socket creation fails
relay: add message when address family is not supported by protocol (on socket creation)
perl: fix calls to callbacks during load of script when multiplicity is disabled (bug #38044)
perl: display script filename in error messages