free sections memory.

src/kernel/config.c

@@ -561,6 +561,7 @@ void kernel_done(void)
     curses_done();
     crmessage_done();
     translation_done();
+    mt_clear();
 }
 
 bool rule_stealth_other(void)

src/util/message.c

@@ -255,6 +255,10 @@ void mt_clear(void) {
         selist_free(ql);
         messagetypes[i] = 0;
     }
+    for (i = 0; i != MAXSECTIONS && sections[i]; ++i) {
+        free(sections[i]);
+        sections[i] = NULL;
+    }
 }
 
 const message_type *mt_find(const char *name)