category should be devel, not www.

Pointed out by: bapt
Remove firstboot-growfs.  As jmg pointed out to me, he added this
functionality to the base system 3 weeks ago...
Use autoconf:env as runtime ports and set perl5 as a build-only dependency.
Set perl5 as a build-only dependency.
Document the removal of sysutils/firstboot-growfs.
Add bsdec2-image-upload port:
  Tool for uploading disk images into Amazon EC2 and creating Amazon
  Machine Images from them.

This will be used to build FreeBSD/EC2 images in the future.
Update 4.2.7p480 --> 4.2.7p481
Port for py-fake-factory.

Reviewed by: mva, wg
Phabric: D1169