different defaults in mke2fs.conf vs. the code itself?

[Eric Sandeen <esandeen@redhat.com>]

from mke2fs.conf in 1.39:

[defaults]
        base_features = sparse_super,filetype,resize_inode,dir_index
        blocksize = 4096

and yet (for example) in PRS():

        if (blocksize <= 0) {
                profile_get_integer(profile, "defaults", "blocksize", 0,
                                    1024, &use_bsize);
                profile_get_integer(profile, "fs_types", fs_type,
                                    "blocksize", use_bsize, &use_bsiz

So the code itself defaults to 1k blocks, but the shipped config file
defaults to 4k blocks?  We noticed this when mke2fs.conf went missing
from the install environment, and formatting large filesystems took a
-very- long time.

Shouldn't these match?  Or for that matter, why should the shipped
config file be either overriding or re-stating defaults in the code
itself?  Seems a bit strange to me.

-Eric