Allow multiple --table options to be specified on the command-line.

Per Issue #18. SimpleStringList code borrowed from pg_dump and a
pending patch to add similar functionality to pg_restore,
clusterdb, vacuumdb, and reindexdb.

The error handling in reorg_one_table() could still be much improved,
so that an error processing a single table doesn't cause pg_reorg to
necessarily bail out and skip further tables, but I'll leave that for
another day.

bin/pgut/pgut-fe.h

@@ -25,13 +25,14 @@ typedef enum pgut_optsrc
  * type:
  *	b: bool (true)
  *	B: bool (false)
- *  f: pgut_optfn
+ *	f: pgut_optfn
  *	i: 32bit signed integer
+ *	l: StringList
  *	u: 32bit unsigned integer
  *	I: 64bit signed integer
  *	U: 64bit unsigned integer
  *	s: string
- *  t: time_t
+ *	t: time_t
  *	y: YesNo (YES)
  *	Y: YesNo (NO)
  */