security/0d1n: fix build

[fuz]

Summary

security/0d1n: fix build

 - convert static REINPLACE_CMD to patch files as per policy
 - remove remaining <alloca.h> uses
 - patch getopt_long use on targets where char is unsigned
 - work around missing __GNUC_PREREQ macro
 - fix other missing includes
 - update pkg-plist to what the maintainer intended to pack
 - patch /opt/0d1n to ${DATADIR} in the relevant files

PR:		269717
Fixes:		88dd085ff7851bb2906039d97a81857fe6d8b2e3
Approved by:	portmgr (build fix)
Approved by:	... (mentor)

A fix for a botched patch, incorporating bits of a maintainer patch
that were omitted from the commit by accident most likely. These
bits were however changed and expanded to improve policy compliance
and to fix some more problems.

Test Plan

Tested with Poudriere on amd64 i386 FreeBSD 12.4 13.1
Arm64 pending. See http://fuz.su/~fuz/freebsd/batch4 for logs.

[fuz]

Mark project as dual licensed GPLv3/BSD3CLAUSE. Upstream
has since removed the GPLv3 license file. Also define
LICENSE_FILE_... as recommended by policy.

[flo]

Approved. I realize that this is one more of those not documented but usually we do it this way things. When we use blanket approval it's often noted as such. i.e. portmgr (blanket, build fix), otherwise it looks like portmgr actively approved this commit, which I *think* the did not?

[fuz]

Thanks, will add the word “blanket” on commit.