K 10
svn:author
V 7
glebius
K 8
svn:date
V 27
2013-03-12T12:12:16.498831Z
K 7
svn:log
V 232
The m_extadd() can fail due to memory allocation failure, thus:
- Make it return int, not void.
- Add wait parameter.
- Update MEXTADD() macro appropriately, defaults to M_NOWAIT, as
  before this change.

Sponsored by:	Nginx, Inc.

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