Merge branch 'bpftool-fixes'

Quentin Monnet says:

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Hi,
Several items for bpftool are included in this set: the first three patches
are fixes for bpftool itself and bash completion, while the last two
slightly improve the information obtained when dumping programs or maps, on
Daniel's suggestion. Please refer to individual commit logs for more
details.
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Signed-off-by: Alexei Starovoitov <[email protected]>