Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

- if gnome keyring is password protected abrt asks for unlock it,
  when you hit cancel on open gnome keyring you will got this crash.

- keyring daemon works only for the session owner so, if user "su"
  to other user abrt will fail to read/write any settings and will load
  the defaults, user still can change the settings and use them, but
  it will be lost when he quit the gui

- if user changes else then the password, the keyring was duped
  and the next time the old one was returned, so we need to make
  sure that the keyring is only updated (so far by removing the old
  one and creating a new one)

- daemon eunning under root can't read/write from ~HOME, so
reading/writting config files have been moved to client (GUI)
- uses gnome keyring to store the credentials