Small rewording in cleanup handlers

Also, there is no need to set corresponding pointers to NULL as cleanup handler should be called only once (per context).

Author: defanator

src/ngx_http_modsecurity_module.c

@@ -699,35 +699,31 @@ static void
 ngx_http_modsecurity_cleanup_instance(void *data)
 {
  ngx_pool_t *old_pool;
- ngx_http_modsecurity_main_conf_t *conf;
+ ngx_http_modsecurity_main_conf_t *mmcf;
 
- conf = (ngx_http_modsecurity_main_conf_t *) data;
+ mmcf = (ngx_http_modsecurity_main_conf_t *) data;
 
- dd("deleting a main conf -- instance is: \"%p\"", conf->modsec);
+ dd("deleting a main conf -- instance is: \"%p\"", mmcf->modsec);
 
- old_pool = ngx_http_modsecurity_pcre_malloc_init(conf->pool);
- msc_cleanup(conf->modsec);
+ old_pool = ngx_http_modsecurity_pcre_malloc_init(mmcf->pool);
+ msc_cleanup(mmcf->modsec);
  ngx_http_modsecurity_pcre_malloc_done(old_pool);
-
- conf->modsec = NULL;
 }
 
 
 static void
 ngx_http_modsecurity_cleanup_rules(void *data)
 {
  ngx_pool_t *old_pool;
- ngx_http_modsecurity_conf_t *conf;
+ ngx_http_modsecurity_conf_t *mcf;
 
- conf = (ngx_http_modsecurity_conf_t *) data;
+ mcf = (ngx_http_modsecurity_conf_t *) data;
 
- dd("deleting a loc conf -- RuleSet is: \"%p\"", conf->rules_set);
+ dd("deleting a loc conf -- RuleSet is: \"%p\"", mcf->rules_set);
 
- old_pool = ngx_http_modsecurity_pcre_malloc_init(conf->pool);
- msc_rules_cleanup(conf->rules_set);
+ old_pool = ngx_http_modsecurity_pcre_malloc_init(mcf->pool);
+ msc_rules_cleanup(mcf->rules_set);
  ngx_http_modsecurity_pcre_malloc_done(old_pool);
-
- conf->rules_set = NULL;
 }