Update ip.8 man page to describe route table id values
2.6 kernel allows 2^32 route tables, but documentation stated only 255 values were possible.
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@ -1395,13 +1395,13 @@ normal routing tables.
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.P
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.B Route tables:
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Linux-2.x can pack routes into several routing
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tables identified by a number in the range from 1 to 255 or by
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name from the file
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Linux-2.x can pack routes into several routing tables identified
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by a number in the range from 1 to 2^31 or by name from the file
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.B /etc/iproute2/rt_tables
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By default all normal routes are inserted into the
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.B main
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table (ID 254) and the kernel only uses this table when calculating routes.
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Values (0, 253, 254, and 255) are reserved for built-in use.
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.sp
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Actually, one other table always exists, which is invisible but
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