Merge b1_4_smallfix from b1_4 (20041001_1227)

Merge b1_4_smallfix from b1_4 (20041001_1227)
- notify osc create thread that OSC is being cleaned up (4600)
- add nettype argument for llmount in #5d in conf-sanity.sh (3936)
- reconstruct ost_handle() like mds_handle() (4657)
- let lconf resolve symlinked-to devices (4629)
- don't unlink "objects" from directory with default EA (4554)
- allocate qswnal tx descriptors singly to avoid fragmentation (4504)
- allow more than 32000 subdirectories in a single directory (3244)
- OST returns ENOSPC from object create when no space left (4539)
- limit OSC precreate to 1/2 of value OST considers bogus (4778)
- bind to privileged port in socknal and tcpnal (3689)