Fix the player information version_string return value (#8616)

* Give more player information

* Correct lua_api.txt

* Correct keys in lua_api.txt

* Improve Code

* Only Bugfix+ser_vers

* Correct doc

* Fix double

src/clientiface.h

@@ -338,6 +338,7 @@ public:
 	u8 getMajor() const { return m_version_major; }
 	u8 getMinor() const { return m_version_minor; }
 	u8 getPatch() const { return m_version_patch; }
+	const std::string &getFull() const { return m_full_version; }
 private:
 	// Version is stored in here after INIT before INIT2
 	u8 m_pending_serialization_version = SER_FMT_VER_INVALID;

src/server.cpp

@@ -1283,7 +1283,7 @@ bool Server::getClientInfo(
 	*major = client->getMajor();
 	*minor = client->getMinor();
 	*patch = client->getPatch();
-	*vers_string = client->getPatch();
+	*vers_string = client->getFull();
 
 	m_clients.unlock();