Improve allocating system and integrate parser

emalloc remplaced with xcalloc/xmalloc/xrealloc
and easy wrappers for strings zmalloc/zcalloc/zrealloc
 - exit on fail
 - prevent size_t overflow

Integrate parser in src/

src/init.c

@@ -196,7 +196,7 @@ init_status(void)
                return;
           }
 
-          conf.status_path = emalloc(strlen(home) + strlen(DEF_STATUS) + 2, sizeof(char));
+          conf.status_path = zmalloc(strlen(home) + strlen(DEF_STATUS) + 2);
           sprintf(conf.status_path, "%s/"DEF_STATUS, home);
      }