Refactoring. Cleanup comments

src/pg_probackup.c

@@ -19,7 +19,7 @@
  * 
  * Functions that work with an instance accept instanceState argument, which
  * includes catalogState, instance_name,
- * info about pgdata associated with the instance,
+ * info about pgdata associated with the instance (see pgState),
  * various instance config options, and list of backups belonging to the instance.
  * + function specific options.
  * 
@@ -31,6 +31,9 @@
  * which includes link to the instanceState, backup_id and backup-specific info.
  * + function specific options.
  *
+ * Functions that work with a postgreSQL instance (i.e. checkdb) accept pgState,
+ * which includes info about pgdata directory and connection.
+ *
  * Portions Copyright (c) 2009-2013, NIPPON TELEGRAPH AND TELEPHONE CORPORATION
  * Portions Copyright (c) 2015-2019, Postgres Professional
  *
@@ -72,7 +75,6 @@ char		backup_instance_path[MAXPGPATH];
  */
 char		arclog_path[MAXPGPATH] = "";
 
-
 static CatalogState *catalogState = NULL;
 /* ================ catalogState (END) =========== */
 

src/pg_probackup_state.h

@@ -2,7 +2,7 @@
  *
  * pg_probackup_state.h: Definitions of internal pg_probackup states 
  *
- * Portions Copyright (c) 2021-2018, Postgres Professional
+ * Portions Copyright (c) 2021, Postgres Professional
  *
  *-------------------------------------------------------------------------
  */