loader: Bump all versions to 3.0

Each incompatible change we make, we bump the major version. We've not
done the bump in a while, so sync everybody to 3.0. Anything older than
3.0 will be given a warning that their boot loader is too old. We check
only the major version, though, so minor versions can still be bumped
for individual loaders (though I honestly doubt we'll ever need to do
that again).

Sponsored by:		Netflix
Reviewed by:		jhb
Differential Revision:	https://reviews.freebsd.org/D45888

stand/efi/loader/version

@@ -1,2 +1,3 @@
+3.0:	Lua scripts API stability
 1.1:	Keep in sync with i386 version.
 0.1:	Initial i386 version. Derived from ia64.

stand/efi/loader/version.veriexec

@@ -1,3 +1,4 @@
+3.0:	Lua scripts API stability
 2.1:	SMBIOS 3 support
 2.0:	Secure boot support
 1.1:	Keep in sync with i386 version.

stand/i386/loader/version

@@ -1,3 +1,4 @@
+3.0:	Lua scripts API stability
 1.1:	New calling conventions for fopen.
 1.0:	New semantics for finding the kernel, new boot.
 0.8:	Set/getenv & cia, copyin/out.

stand/kboot/kboot/version

@@ -1 +1,2 @@
+3.0:	Lua scripts API stability
 0.1:	Initial kboot/PowerPC version.

stand/powerpc/ofw/version

@@ -1 +1,2 @@
+3.0:	Lua scripts API stability
 0.1:	Initial OFW/PowerPC version.

stand/uboot/version

@@ -1 +1,2 @@
+3.0:	Lua scripts API stability
 1.5:	Unified ubldr build

stand/userboot/userboot/version

@@ -1,3 +1,4 @@
+3.0:	Lua scripts API stability
 1.2:	Userboot with lua or forth
 1.1:	Initial userland boot