net: Run clang-format on protocol.h

Can be reviewed with the git diff flags
-U0 --ignore-all-space --word-diff-regex=.

src/protocol.h

@@ -248,7 +248,7 @@ extern const char *GETCFCHECKPT;
  * BIP 157 & 158.
  */
 extern const char* CFCHECKPT;
-};
+}; // namespace NetMsgType
 
 /* Get a vector of all valid message types (see above) */
 const std::vector<std::string>& getAllNetMessageTypes();
@@ -320,7 +320,8 @@ void SetServiceFlagsIBDCache(bool status);
  * == GetDesirableServiceFlags(services), ie determines whether the given
  * set of service flags are sufficient for a peer to be "relevant".
  */
-static inline bool HasAllDesirableServiceFlags(ServiceFlags services) {
+static inline bool HasAllDesirableServiceFlags(ServiceFlags services)
+{
     return !(GetDesirableServiceFlags(services) & (~services));
 }
 
@@ -328,7 +329,8 @@ static inline bool HasAllDesirableServiceFlags(ServiceFlags services) {
  * Checks if a peer with the given service flags may be capable of having a
  * robust address-storage DB.
  */
-static inline bool MayHaveUsefulAddressDB(ServiceFlags services) {
+static inline bool MayHaveUsefulAddressDB(ServiceFlags services)
+{
     return (services & NODE_NETWORK) || (services & NODE_NETWORK_LIMITED);
 }
 
@@ -374,8 +376,7 @@ const uint32_t MSG_TYPE_MASK    = 0xffffffff >> 2;
  * These numbers are defined by the protocol. When adding a new value, be sure
  * to mention it in the respective BIP.
  */
-enum GetDataMsg
-{
+enum GetDataMsg {
     UNDEFINED = 0,
     MSG_TX = 1,
     MSG_BLOCK = 2,