Pullup ticket #4473 - requested by wiz
www/serf: security update

Revisions pulled up:
- www/serf/Makefile                                             1.31
- www/serf/distinfo                                             1.17

---
   Module Name:	pkgsrc
   Committed By:	wiz
   Date:		Sat Aug 16 12:11:53 UTC 2014

   Modified Files:
   	pkgsrc/www/serf: Makefile distinfo

   Log Message:
   Update to 1.3.7:

   Serf 1.3.7 [2014-08-11, from /tags/1.3.7, r2411]
     Handle NUL bytes in fields of an X.509 certificate. (r2393, r2399)
Pullup ticket #4473.