Merge branch 'collectd-4.2' into collectd-4.3

Conflicts:

	configure.in
	src/perl.c

diff --cc configure.in
Simple merge

diff --cc src/perl.c
index 96e8562,68d6ddc..877bc00
--- 1/src/perl.c
--- 2/src/perl.c
+++ b/src/perl.c
@@@ -1357,35 -817,18 +1357,40 @@@ static int init_pi (int argc, char **ar
        }
  #endif /* COLLECT_DEBUG */
  
 +      if (0 != pthread_key_create (&perl_thr_key, c_ithread_destructor)) {
 +              log_err ("init_pi: pthread_key_create failed");
 +
 +              /* this must not happen - cowardly giving up if it does */
 +              exit (1);
 +      }
 +
+ #ifdef __FreeBSD__
+       /* On FreeBSD, PERL_SYS_INIT3 expands to some expression which
+        * triggers a "value computed is not used" warning by gcc. */
+       (void)
+ #endif
        PERL_SYS_INIT3 (&argc, &argv, &environ);
  
 -      if (NULL == (perl = perl_alloc ())) {
 -              log_err ("module_register: Not enough memory.");
 +      perl_threads = (c_ithread_list_t *)smalloc (sizeof (c_ithread_list_t));
 +      memset (perl_threads, 0, sizeof (c_ithread_list_t));
 +
 +      pthread_mutex_init (&perl_threads->mutex, NULL);
 +      /* locking the mutex should not be necessary at this point
 +       * but let's just do it for the sake of completeness */
 +      pthread_mutex_lock (&perl_threads->mutex);
 +
 +      perl_threads->head = c_ithread_create (NULL);
 +      perl_threads->tail = perl_threads->head;
 +
 +      if (NULL == (perl_threads->head->interp = perl_alloc ())) {
 +              log_err ("init_pi: Not enough memory.");
                exit (3);
        }
 -      perl_construct (perl);
 +
 +      aTHX = perl_threads->head->interp;
 +      pthread_mutex_unlock (&perl_threads->mutex);
 +
 +      perl_construct (aTHX);
  
        PL_exit_flags |= PERL_EXIT_DESTRUCT_END;