add CHANGES entries for r1497429

     escaped to prevent terminal escape sequences from entering the

     log file.  [Eric Covener, Jeff Trawick, Joe Orton]

  *) core: Limit ap_pregsub() to 64MB and add ap_pregsub_ex() for longer

     strings.  The default limit for ap_pregsub() can be adjusted at compile

      time by defining AP_PREGSUB_MAXLEN.  [Stefan Fritsch, Jeff Trawick]

  *) mod_setenvif: Log error on substitution overflow.

     [Stefan Fritsch]

  *) mod_ssl: Quiet FIPS mode weak keys disabled and FIPS not selected emits

     in the error log to debug level.  [William Rowe]