security/snort2pfcd: Update to 3.2

No official changelog available. According to maintainer, the major changes for this release are optimizations:

-Moved several global variables to local
-Fewer Malloc calls
-Several stack optimizations
-More compiler flags and fixes for those warnings
-Fixed compiler escaping bug involving memset for char

PR: 249904
Submitted by: Samee Shahzada <onestsam@gmail.com> (maintainer)
Approved by: tcberner (mentor)
Differential Revision: https://reviews.freebsd.org/D26659