mdbx: backport - fix comments typos (squashed).

src/bits.h

@@ -408,7 +408,7 @@ typedef struct MDBX_lockinfo {
   volatile uint32_t mti_envmode;
 
 #ifdef MDBX_OSAL_LOCK
-  /* Mutex protecting write access to this table. */
+  /* Mutex protecting write-txn. */
   union {
     MDBX_OSAL_LOCK mti_wmutex;
     uint8_t pad_mti_wmutex[MDBX_OSAL_LOCK_SIZE % sizeof(size_t)];

src/mdbx.c

@@ -5391,7 +5391,7 @@ static int __cold mdbx_setup_dxb(MDBX_env *env, int lck_rc) {
 
     /* apply preconfigured params, but only if substantial changes:
      *  - upper or lower limit changes
-     *  - shrink theshold or growth step
+     *  - shrink threshold or growth step
      * But ignore just chagne just a 'now/current' size. */
     if (bytes_align2os_bytes(env, env->me_dbgeo.upper) !=
             pgno_align2os_bytes(env, meta.mm_geo.upper) ||