Merge #9936: [trivial] Fix three typos introduced into walletdb.h in commit 7184e25

fdab309 [trivial] Fix typos introduced in 7184e25c80 (practicalswift)

Tree-SHA512: 091666f996267fc5d9f911e6ff25051df5c198851a9c2a6cae73692ffacc64f4275932260487aa48a224ca7f80c58f79933065c72d42aeccae540293c67bcee9

src/wallet/walletdb.h

@@ -172,11 +172,11 @@ public:
     DBErrors ZapSelectTx(std::vector<uint256>& vHashIn, std::vector<uint256>& vHashOut);
     /* Try to (very carefully!) recover wallet database (with a possible key type filter) */
     static bool Recover(const std::string& filename, void *callbackDataIn, bool (*recoverKVcallback)(void* callbackData, CDataStream ssKey, CDataStream ssValue));
-    /* Recover convenience-function to bypass the key filter callback, called when verify failes, recoveres everything */
+    /* Recover convenience-function to bypass the key filter callback, called when verify fails, recovers everything */
     static bool Recover(const std::string& filename);
     /* Recover filter (used as callback), will only let keys (cryptographical keys) as KV/key-type pass through */
     static bool RecoverKeysOnlyFilter(void *callbackData, CDataStream ssKey, CDataStream ssValue);
-    /* Function to determin if a certain KV/key-type is a key (cryptographical key) type */
+    /* Function to determine if a certain KV/key-type is a key (cryptographical key) type */
     static bool IsKeyType(const std::string& strType);
     /* verifies the database environment */
     static bool VerifyEnvironment(const std::string& walletFile, const boost::filesystem::path& dataDir, std::string& errorStr);