Fix typos in C comments in miscellaneous files

include/mysql/plugin.h

@@ -102,7 +102,7 @@ typedef struct st_mysql_xid MYSQL_XID;
 /* MariaDB plugin types */
 /** Client and server password validation */
 #define MariaDB_PASSWORD_VALIDATION_PLUGIN  8 
-/**< Encryption and key managment plugins */
+/**< Encryption and key management plugins */
 #define MariaDB_ENCRYPTION_PLUGIN 9
 /**< Plugins for SQL data storage types */
 #define MariaDB_DATA_TYPE_PLUGIN  10

include/mysql/plugin_encryption.h

@@ -99,7 +99,7 @@ struct st_mariadb_encryption
     writes the output to the dst buffer. note that it might write
     more bytes that were in the input. or less. or none at all.
 
-    dlen points to the starting lenght of the output buffer. Upon return, it
+    dlen points to the starting length of the output buffer. Upon return, it
     should be set to the number of bytes written.
   */
   int (*crypt_ctx_update)(void *ctx, const unsigned char* src, unsigned int slen,

include/mysql/psi/psi.h

@@ -2374,7 +2374,7 @@ typedef void (*destroy_prepared_stmt_v1_t)
   (PSI_prepared_stmt *prepared_stmt);
 
 /**
-  repreare a prepare statement.
+  reprepare a prepare statement.
   @param prepared_stmt prepared statement.
 */
 typedef void (*reprepare_prepared_stmt_v1_t)