adding a function to free the ssl context

inc/rfc3161.h

@@ -39,3 +39,4 @@ TS_RESP_CTX *create_tsctx(rfc3161_context *ct, CONF *conf, const char *section,
                           const char *policy);
 int add_oid_section(rfc3161_context *ct, CONF *conf);
 void init_ssl();
+void free_ssl();

src/lib/http.c

@@ -206,6 +206,7 @@ int http_server_start(char *conffile, char *conf_wd, bool stdout_dbg) {
     // Stop the server.
     mg_stop(ctx);
     free(ct);
+    free_ssl();
 
     return 0;
 }

src/lib/rfc3161.c

@@ -73,6 +73,10 @@ void init_ssl(){
     ERR_load_TS_strings();
 }
 
+void free_ssl() {
+    ERR_free_strings();
+}
+
 TS_RESP_CTX *create_tsctx(rfc3161_context *ct, CONF *conf, const char *section,
                           const char *policy) {
     unsigned long err_code;