replace MAX_PEER_CONNECTIONS with MAX_ADDITIONAL_PEER_CONNECTIONS
replace MAX_PEER_CONNECTIONS with MAX_ADDITIONAL_PEER_CONNECTIONS

Signed-off-by: Rafał Malinowski <b8f60c52f3f0b57a213b606f2d63f58ef0768b73@gmail.com>

stellar/docker-stellar-core,stellar/docker-stellar-core