Include git info into docker build, show git ref at version (#3829)

* ci: include .git directory into build

* p2p: include git ref into version for user agent, show git commit hash instead of last tag into log

* p2p: do not show anything after version if git commit hash is empty

* fix: user agent typo

api/src/types.rs

@@ -95,7 +95,7 @@ impl Status {
 		Status {
 			chain: global::get_chain_type().shortname(),
 			protocol_version: ser::ProtocolVersion::local().into(),
-			user_agent: p2p::msg::USER_AGENT.to_string(),
+			user_agent: p2p::msg::user_agent().to_string(),
 			connections: connections,
 			tip: Tip::from_tip(current_tip),
 			sync_status,
@@ -465,7 +465,8 @@ impl<'de> serde::de::Deserialize<'de> for OutputPrintable {
 				}
 
 				if output_type.is_none()
-					|| commit.is_none() || spent.is_none()
+					|| commit.is_none()
+					|| spent.is_none()
 					|| proof_hash.is_none()
 					|| mmr_index.is_none()
 				{