Log Message:
w3m{,-img}: Update www/w3m{,-img} to 0.5.3.20180125

Changes:
Debian's w3m 0.5.3+git20180125
* bug fixes
 - fix stack overflow with malformed text [CVE-2018-6196]
 - fix null deref with malformed text [CVE-2018-6197]
 - fix /tmp file races only when ~/.w3m is unwritable [CVE-2018-6198]
 - do not remove w3mdict.cgi when "make distclean"
 - do not turn a form's GET into POST
 - correct <base ...> parsing
 - accept TERM=fbterm
* new feature
 - extend ssl_forbid_method to disable TLSv1.1