#1 Improve "const correctness"

[Markus Elfring]

Would you like to apply the advices from the article
"http://en.wikipedia.org/wiki/Const_correctness" to
your sources?
I suggest to add the key word "const" to the type
specifiers for parameters like the following.
- newaddr (function "br_fdb_changeaddr")

http://cvs.sourceforge.net/viewcvs.py/ebtables/ebtables2/kernel/linux2.5/net/bridge/br_private.h?rev=1.1&view=markup

- matchmask (function "is_same")

http://cvs.sourceforge.net/viewcvs.py/ebtables/ebtables2/userspace/arptables/libarptc/libarptc.c?rev=1.3&view=markup

[Bart De Schuymer]

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I'll try to think about it in my next code reading.

[Markus Elfring]

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I suggest to keep this issue open until it will be fixed.