net/linux/addrs: fix point-to-point peer address bug #1239
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On point-to-point networks IFA_ADDRESS points to the peer address
instead of the local address.
/*
* Important comment:
* IFA_ADDRESS is prefix address, rather than local interface address.
* It makes no difference for normally configured broadcast interfaces,
* but for point-to-point IFA_ADDRESS is DESTINATION address,
* local address is supplied in IFA_LOCAL attribute.
*/
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For point-to-point interfaces IFA_ADDRESS points to the peer address instead of the local address.