(1) Trailing/leading spaces are removed from 'name's/'blurb's
(2) Duplicate 'blurb's are replaced with NULL
(3) Empty ("") 'blurb's are replaced with NULL
(4) BASE_NONE, NULL, 0x0 are used for 'display', 'strings' and 'bitmask' fields
for FT_NONE, FT_BYTES, FT_IPv4, FT_IPv6, FT_ABSOLUTE_TIME, FT_RELATIVE_TIME,
FT_PROTOCOL, FT_STRING and FT_STRINGZ field types
(5) Only allow non-zero value for 'display' if 'bitmask' is non-zero
svn path=/trunk/; revision=28770
1. Priority field decode.
The 802.1q tag field of a frame is separated from its frame body in
a ERSPAN packet.
Current packet-cisco-erspan.c decodes only the vlan id field of the
802.1q tag.
This patch can also decode the priority field of the 802.1q tag.
2. Direction of a captured frame decode.
A ERSPAN packet includes the additional information of the direction
a captured frame as below.
If a caputred frame comes from outside to a switch port, this means an
'Incoming' frame. If a caputred frame goes out of a switch port,
this is an 'Outgoing' frame.
Added an extra unknown value for the bit between direction and spanid.
svn path=/trunk/; revision=22649
Kovarththanan Rajaratnam