minicom: 2.4 -> 2.6.2

This also fixes the annoying issue that minicom doesn't work out of the
box:

  $ minicom
  minicom: there is no global configuration file /etc/minirc.dfl
  Ask your sysadmin to create one (with minicom -s).

  $ sudo minicom -s
  minicom: there is no global configuration file /etc/minirc.dfl
  Ask your sysadmin to create one (with minicom -s).

minicom 2.4 basically refuses to enter setup unless /etc/minirc.dfl
already exists. sudo touch /etc/minirc.dfl is enough to fix that though,
but with this commit "sudo minicom -s" will work out of the box.