Add --showcodesflags to show codes AND their flags

Output looks something like this:

[root@localhost nfs4.0]# ./testserver.py --showcodesflags | grep lockt
LKT1 FLAGS: lockt, all
LKT2a FLAGS: lockt, symlink, all
LKT2b FLAGS: lockt, block, all
LKT2c FLAGS: lockt, char, all
LKT2d FLAGS: lockt, dir, all
LKT2f FLAGS: lockt, fifo, all
LKT2s FLAGS: lockt, socket, all
LKT3 FLAGS: lockt, all
LKT4 FLAGS: lockt, all
LKT5 FLAGS: lockt, all
LKT6 FLAGS: lockt, all
LKT7 FLAGS: lockt, all
LKT8 FLAGS: lockt, emptyfh, all
LKT9 FLAGS: lockt, all
LKTOVER FLAGS: lockt, all
LOCK1 FLAGS: lock, lockt, all

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>