9p: remove unused option Opt_trans
9p: fix return code of read() when count is 0
9p: kerneldoc warning fixes
net/9p: use memcpy() instead of snprintf() in p...
9p: use unsigned integers for nwqid/count
9p: do not crash on unknown lock status code
net/9p: Initialize opts->privport as it should be.
9p: fix error handling in v9fs_file_do_lock