debootstrap: update to 1.0.63

Signed-off-by: Jiri Slachta <slachta@cesnet.cz>
Merge pull request #369 from jslachta/debootstrap

debootstrap: update to 1.0.63
openconnect: increased the timeout value for retrying

Signed-off-by: Nikos Mavrogiannopoulos <nmav@gnutls.org>
openconnect: corrected instructions

Signed-off-by: Nikos Mavrogiannopoulos <nmav@gnutls.org>