add advice to set the size of a buffer initialized with existing data

add copy-on-extend feature to UCX buffer - fixes #533

add CHANGELOG entry for issue #431

merge remote changes

add CHANGELOG entry for issue #531

add copy-on-write feature to UCX buffer - fixes #531

fix out of range access in test on platforms which are actually shrinking the buffer

add shortcut to binary search when array size is one

add szmul.c to msvc project

fix wrong "variant" of zero/NULL/false

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mercurial