K 10 svn:author V 3 avg K 8 svn:date V 27 2017-05-26T11:05:56.651398Z K 7 svn:log V 249 arc_init: make code closer to upstream by introducing 'allmem' variable All the differences in calculations are kept. A comment about arc_max being 1/2 of all memory is fixed to reflect the actual code that uses 5/8 as a factor. MFC after: 1 week END