Land b1_2_smallfix onto b1_2 (20040824_0018)

Land b1_2_smallfix onto b1_2 (20040824_0018)
- replace config semaphore with spinlock (3306)
- be sure to send a reply for a CANCEL rpc with bad export (3863)
- don't allow enqueue to complete on a destroyed export (3822)
- down write_lock before checking llog header bitmap (3825)
- recover from lock replay timeout (3764)
- up llog sem before sending rpc (3652)
- change a dlm LBUG to LASSERTF, to maybe learn something (4228)
- fix NULL deref and obd_dev leak on setup error (3312)
- replace some LBUG about llog ops with error handling (3841)
- don't match INVALID dentries from d_lookup and spin (3784)
- hold dcache_lock while marking dentries INVALID and hashing (4255)
- add libwrap support for the TCP acceptor (3996)
- add /proc/sys/portals/routes for non-root route listing (3994)
- allow setting MDS UUID in .xml (2580)
- print the stack of a process that LBUGs (4228)
- add validity checks when grabbing inodes from l_ast_data (3599)