mdtest options not documented in man page

[rfmohr]

As I was looking through the mdtest source, I noticed several options that did not appear to be documented in the man page:
-a: supported APIs
-k: use mknod to create files
-P : print rate and time
-W: number in seconds; stonewall timer
-x: StoneWallingStatusFile
-X,--verify-read: Verify the data read
--verify-write: Verify data after a write
-y: sync file after writing
-Y: call sync after each phase
-Z: print time instead of rate
--warningAsErrors: any warning should lead to an error

Also (when verbose >=1), the section that prints out the current option values doesn't seem to include the following:

branch_factor
remove_only
print_rate_and_time
randomize
stoneWallingStatusFile
verify_read
verify_write
print_time

I know the output lists the command line and options that were invoked, but for consistency it might be good to include the above option values as well.