The lack of _WITH_PHDR in WTAP_ENCAP_BLUETOOTH_H4 means there's no

The lack of _WITH_PHDR in WTAP_ENCAP_BLUETOOTH_H4 means there's no
pseudo-header, and hence there's no direction indication. Don't set
pinfo->p2p_dir for it.  Use WTAP_ENCAP_BLUETOOTH_H4_WITH_PHDR, not
WTAP_ENCAP_BLUETOOTH_H4, for capture files where we have the direction.

Don't assume pinfo->p2p_dir is either P2P_DIR_SENT or P2P_DIR_RECV when
setting the info column in various Bluetooth dissectors; it might be
unknown.

In the HCI H4 dissector, put the direction into the info column
regardless of whether we have a type match or not; the dissectors for
HCI packet types appear to assume it's been set (as they put a blank at
the beginning of the stuff they append to the direction).

svn path=/trunk/; revision=35933