Constant zebra_network::protocol::external::message::MAX_USER_AGENT_LENGTH

pub const MAX_USER_AGENT_LENGTH: usize = 256;

The maximum size of the user agent string.

This is equivalent to MAX_SUBVERSION_LENGTH in zcashd: https://github.com/zcash/zcash/blob/adfc7218435faa1c8985a727f997a795dcffa0c7/src/net.h#L56