merge kevin@kelphead.org's mmunmap under zoneminder fix
https://rt.cpan.org/Ticket/Display.html?id=91483
croak("variable is not a string") was hitting beccause it was being
too selective with SV type for modern perls.
Add Todd to the authors; he did way more work on this than I ever did.
merge patch from Greg Lindahl for COW support:
"sys-mmap 0.16 is getting a bit old, here are patches for copy on write and adding the MAP_LOCKED flag."
1 of 2 from https://rt.cpan.org/Ticket/Display.html?id=96043
add MAP_LOCKED patch from Greg Lindahl
https://rt.cpan.org/Ticket/Display.html?id=96043
Merge remote-tracking branch 'scrottie/master'