Copy stable/11@r303970 to releng/11.0 as part of the 11.0-RELEASE
cycle.

Prune svn:mergeinfo from the new branch, and rename it to RC1.

Update __FreeBSD_version.

Use the quarterly branch for the default FreeBSD.conf pkg(8) repo and
the dvd1.iso packages population.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Don't resize again prior to writing. Resizing may not be idempotent
and no scheme adjusts the size after the format resized the image
the first time.

MFuser/marcel/mkimg:
Add support for different output formats:
1. The output file that was previously written is now called the raw format.
2. Add the vmdk output format to create VMDK images.

When the format is not given, the raw output format is assumed.

Have the format resize twice. The first time is before we call
scheme_write(). The second time is immediately before we call
the format's write function. The first call is needed to have
the scheme know the right image size. The second call is needed
to compensate for the scheme adjusting the size while writing.

Give output formats a chance to (re-)size the image before the
scheme adds the partitioning metadata. This is needed by VMDK
to round the image size to the grain size.

Add format_write() that calls the write() function of the output
format. Have the raw format use image_copyout() for now.

Add a linker set for output formats. This is mostly copied and trimmed
from the linker set for schemes. Add stubs for raw and vmdk output
formats so as to demonstrate that the usage message is correct.