Merge bitcoin#14331: doxygen: Fix member comments

fa69ac7 doxygen: Fix member comments (MarcoFalke)

Pull request description:

  Trailing comments must be indicted with the caret `//!<`.

  Not all places do this right now, see for example https://dev.visucore.com/bitcoin/doxygen/txmempool_8h.html#a2bc6653552b5871101b6cbefdbaf251f, but they can be fixed with an almost-scripted-diff:

  ```
  sed -i --regexp-extended -e 's/((,|;) *\/\/!) /\1< /g' $(git grep --extended-regexp -l  '(,|;)\s*//!\s')
  ```

  (Same as  [doxygen] Fix member comments bitcoin#7793)

Tree-SHA512: 451077008353ccc6fcc795f34094b2d022feb7a171b562a07ba4de0dcb0aebc137e12b03970764bd81e2da386751d042903db4c4831900f43c0cfde804c81b2b

Author: MarcoFalke

Diff for: src/net_processing.h

@@ -75,7 +75,7 @@ class PeerLogicValidation final : public CValidationInterface, public NetEventsI
     void EvictExtraOutboundPeers(int64_t time_in_seconds) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
 
 private:
-    int64_t m_stale_tip_check_time; //! Next time to check for stale tip
+    int64_t m_stale_tip_check_time; //!< Next time to check for stale tip
 
     /** Enable BIP61 (sending reject messages) */
     const bool m_enable_bip61;

Diff for: src/netbase.cpp

@@ -197,10 +197,10 @@ enum SOCKSVersion: uint8_t {
 
 /** Values defined for METHOD in RFC1928 */
 enum SOCKS5Method: uint8_t {
-    NOAUTH = 0x00,        //! No authentication required
-    GSSAPI = 0x01,        //! GSSAPI
-    USER_PASS = 0x02,     //! Username/password
-    NO_ACCEPTABLE = 0xff, //! No acceptable methods
+    NOAUTH = 0x00,        //!< No authentication required
+    GSSAPI = 0x01,        //!< GSSAPI
+    USER_PASS = 0x02,     //!< Username/password
+    NO_ACCEPTABLE = 0xff, //!< No acceptable methods
 };
 
 /** Values defined for CMD in RFC1928 */
@@ -212,15 +212,15 @@ enum SOCKS5Command: uint8_t {
 
 /** Values defined for REP in RFC1928 */
 enum SOCKS5Reply: uint8_t {
-    SUCCEEDED = 0x00,        //! Succeeded
-    GENFAILURE = 0x01,       //! General failure
-    NOTALLOWED = 0x02,       //! Connection not allowed by ruleset
-    NETUNREACHABLE = 0x03,   //! Network unreachable
-    HOSTUNREACHABLE = 0x04,  //! Network unreachable
-    CONNREFUSED = 0x05,      //! Connection refused
-    TTLEXPIRED = 0x06,       //! TTL expired
-    CMDUNSUPPORTED = 0x07,   //! Command not supported
-    ATYPEUNSUPPORTED = 0x08, //! Address type not supported
+    SUCCEEDED = 0x00,        //!< Succeeded
+    GENFAILURE = 0x01,       //!< General failure
+    NOTALLOWED = 0x02,       //!< Connection not allowed by ruleset
+    NETUNREACHABLE = 0x03,   //!< Network unreachable
+    HOSTUNREACHABLE = 0x04,  //!< Network unreachable
+    CONNREFUSED = 0x05,      //!< Connection refused
+    TTLEXPIRED = 0x06,       //!< TTL expired
+    CMDUNSUPPORTED = 0x07,   //!< Command not supported
+    ATYPEUNSUPPORTED = 0x08, //!< Address type not supported
 };
 
 /** Values defined for ATYPE in RFC1928 */

Diff for: src/policy/fees.h

@@ -50,9 +50,9 @@ std::string StringForFeeReason(FeeReason reason);
 
 /* Used to determine type of fee estimation requested */
 enum class FeeEstimateMode {
-    UNSET,        //! Use default settings based on other criteria
-    ECONOMICAL,   //! Force estimateSmartFee to use non-conservative estimates
-    CONSERVATIVE, //! Force estimateSmartFee to use conservative estimates
+    UNSET,        //!< Use default settings based on other criteria
+    ECONOMICAL,   //!< Force estimateSmartFee to use non-conservative estimates
+    CONSERVATIVE, //!< Force estimateSmartFee to use conservative estimates
 };
 
 bool FeeModeFromString(const std::string& mode_string, FeeEstimateMode& fee_estimate_mode);

Diff for: src/txmempool.h

@@ -352,12 +352,12 @@ struct TxMempoolInfo
  * this is passed to the notification signal.
  */
 enum class MemPoolRemovalReason {
-    UNKNOWN = 0, //! Manually removed or unknown reason
-    EXPIRY,      //! Expired from mempool
-    SIZELIMIT,   //! Removed in size limiting
-    REORG,       //! Removed for reorganization
-    BLOCK,       //! Removed for block
-    CONFLICT,    //! Removed for conflict with in-block transaction
+    UNKNOWN = 0, //!< Manually removed or unknown reason
+    EXPIRY,      //!< Expired from mempool
+    SIZELIMIT,   //!< Removed in size limiting
+    REORG,       //!< Removed for reorganization
+    BLOCK,       //!< Removed for block
+    CONFLICT,    //!< Removed for conflict with in-block transaction
 };
 
 class SaltedTxidHasher