Log Message:
Updated w3m to 0.5.3.0.20161120.

Debian's w3m 0.5.3+git20161120

* bug fixes
 - fix multiple flaws with malformed text
   (stack overflow, buffer overflow, null deref, out of memory)
 - fix stack overflow with nested table and textarea [CVE-2016-9439]
 - fix suspend (^Z) behavior