/usr/share/openmpi/amca-param-sets/example.conf is in openmpi-common 1.6.5-9.1+deb8u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 | #
# This is an example file illustrating how to setup an Aggregate MCA parameters
# file.
#
#
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