afsocket: Only build the tests if SSL is enabled

The tests require SSL support enabled, and compilation fails if it is
not present. Only build and run them when SSL support is available.

Reported-by: Viktor Tusa <tusa@balabit.hu>
Signed-off-by: Gergely Nagy <algernon@balabit.hu>
driver: Fix a memory leak in log_driver_free()

After freeing up the members of self->plugins, free self->plugins itself
too.

Signed-off-by: Gergely Nagy <algernon@balabit.hu>
json: Added json-c as git submodule
run-id: Fixed run_id_is_same_run functionality.

The test and the code was obviously bad.

Signed-off-by: Tusa Viktor <tusavik@gmail.com>
Merge pull request #70 from talien/f/run-id-is-same-run-fix

run-id: Fixed run_id_is_same_run functionality.
libtest: Added library for persist-related functions in tests.

This lib covers common tasks for creating/restarting/destroying
PersistState objects.

Also refactored test to use persist_lib provided functions.

Signed-off-by: Viktor Tusa <tusa@balabit.hu>
persist-state: Refactor and extend some PersistEntry-related functions.

Added persist_state_remove_entry.

Removing an entry from persist-state sets its in_use value to zero.
At next open of persist_state, this entry will be purged.
Merge pull request #66 from talien/f/json-submodule

json: Added json-c as git submodule
Merge pull request #63 from algernon/merge/h/make-check-without-openssl

afsocket: Only build the tests if SSL is enabled
Merge pull request #64 from algernon/merge/h/driver-plugin-leak-fix

driver: Fix a memory leak in log_driver_free()
Merge pull request #71 from talien/f/persist-refactor-and-libtest

F/persist refactor and libtest
logmsg: Do not use NULL template_options parameter for log_macro_expand.

In case of time-related macros, it uses the members of the
LogTemplateOptions* structure, but it results in a NULL pointer
dereference. Instead of spraying the log_macro_expand code with NULL checks,
we pass an initialized options structure to the function, and wrap it
in the log_macro_expand_simple function.

Signed-off-by: Viktor Tusa <tusa@balabit.hu>
Signed-off-by: Balazs Scheidler <bazsi@balabit.hu>
contrib: Add a Valgrind suppression file

When debugging memory leaks in syslog-ng, there are a couple of known
false positives, or leaks we do not care about (such as OpenSSL
initialisers and such). To silence those, a suppression file was
created. Simply add a --suppressions=/path/to/valgrind/syslog-ng.supp to
the Valgrind command line, and there will be so much less noise.

Signed-off-by: Gergely Nagy <algernon@balabit.hu>