Branch b1_4

Branch b1_4
- add user_xattr to lov.sh, uml.sh client mount options
- don't run xattr sanity test 102 when not root or mounted with user_xattr
- add nouser_xattr mount option to allow user_xattr to be unset
- add check for linux/xattr_acl.h + compat (doesn't exist on BG/L)
- fix test 56, 65a with default striping on parent directory
- add ChangeLog entry for gmnalnid support to llmount.c
- add ChangeLog entry for xattr support
b=7979, b=8592, b=9504, b=9505