Merge #9833: Trivial: fix comments referencing AppInit2
Summary:
backport PR9833 https://github.com/bitcoin/bitcoin/pull/9833/files
ef9f495 Trivial: fix comments referencing AppInit2 (Marko Bencun)
": Running AppInit2 in thread" was changed in D1928
Test Plan: read
Reviewers: jasonbcox, #bitcoin_abc, deadalnix, Fabien
Reviewed By: jasonbcox, #bitcoin_abc, Fabien
Differential Revision: https://reviews.bitcoinabc.org/D3011