Dmitry Vyukov 588a542b2a sys: add string flags
Allow to define string flags in txt descriptions. E.g.:

  filesystem = "ext2", "ext3", "ext4"

and then use it in string type:

  ptr[in, string[filesystem]]
2016-11-11 14:33:37 -08:00
..
2015-12-27 12:20:00 +01:00
2016-11-11 14:33:37 -08:00