pfSense

Be a little smarter about the default kernel in rare cases where we cannot determine what was in use.

Remove other potential places where someone could select a kernel we no longer ship. Try to improve kernel detection a little more.

Don't skip over wrap_vga here.

Fix case, it's not ARGV it's argv for php

Be more verbose during upgrade to see why nanobsd isn't carrying over the setting as expected.

Fixup post-update processing on NanoBSD

Use !empty instead of isset to prevent accidental deletion of the last used repository URL when firmware update gitsync settings have been saved without a repository URL.

Fix filename used in check for existence of the uniprocessor kernel to match the one that was being used to extract.

Fixup the kernel upgrade code a bit to be safer, and assume SMP in the default case, and also warn if there was a problem. Should fix #1427

Unbreak a number of explode() replacements which required preg_split()