add `$pipestatus` support#5632

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zabereer wants to merge 13 commits into

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zabereer:pipestatus

Commits on Feb 9, 2019

Commits on Feb 13, 2019

preserve `$pipestatus` value to next prompt
zabereer
committed

Commits on Feb 14, 2019

Commits on Feb 17, 2019

Commits on Feb 20, 2019

add man page for `$pipestatus`
zabereer
committed

Commits on Feb 21, 2019

remove reader.cpp changes for `$pipestatus` and rather preserve it in event.cpp
zabereer
committed
ensure `$pipestatus` is set even if there was a syntax error
zabereer
committed
remove `$pipestatus` man page and add a subsection in index
zabereer
committed

Commits on Feb 24, 2019

ensure `$pipestatus` is preserved at prompt
zabereer
committed