xcap_client: libssl thread executor for curl_global_init()

Cherry-pick from f5164b3

src/modules/xcap_client/xcap_client.c

@@ -41,6 +41,9 @@
 #include "../../core/mem/shm_mem.h"
 #include "../../core/rpc.h"
 #include "../../core/rpc_lookup.h"
+#define KSR_RTHREAD_NEED_4L
+#define KSR_RTHREAD_SKIP_P
+#include "../../core/rthreads.h"
 #include "../presence/utils_func.h"
 #include "xcap_functions.h"
 #include "xcap_client.h"
@@ -140,7 +143,7 @@ static int mod_init(void)
 	xcap_dbf.close(xcap_db);
 	xcap_db = NULL;
 
-	curl_global_init(CURL_GLOBAL_ALL);
+	run_thread4L((_thread_proto4L)curl_global_init, CURL_GLOBAL_ALL);
 
 	if(periodical_query) {
 		register_timer(query_xcap_update, 0, query_period);