cherokee: fix SRC_URI

The package is no longer available in the official cherokee site,
so download it from a mirror.

Signed-off-by: Javier Viguera <javier.viguera@digi.com>
Signed-off-by: Eric Bénard <eric@eukrea.com>
net-snmp: Backport fix for NETSNMP_NO_SYSTEMD typos

Use patch from master branch to fix:

snmpd.c:459: undefined reference to `netsnmp_sd_listen_fds'

Signed-off-by: Javier Viguera <javier.viguera@digi.com>
Signed-off-by: Eric Bénard <eric@eukrea.com>