Fixing whitespace warnings from checkpatch.pl
Fixing brace warnings from checkpatch.pl
Undoing error message change.

Yes, the message is wrong, however, it's not within the scope of
what we're doing, and doesn't belong in these patches.
Changing variable min_packet_size to min_body_size in parse_tag_3_packet()
editing comments
use BUILD_BUG_ON in main.c as per Tyler's suggestions
evicting ECB mode from patch (revert if needed)
Removing GCM for patch submission. Revert this later
preventing checkpatch.pl from exploding on comments