dirstate-v2: add an option to prevent unintentional slow dirstate-v2
This is the project policy discussed in November 2020 and already put to use for
the persistent nodemap.
Differential Revision: https://phab.mercurial-scm.org/D11668
BasedOnStyle: LLVM
IndentWidth: 8
UseTab: ForIndentation
BreakBeforeBraces: Linux
AllowShortIfStatementsOnASingleLine: false
IndentCaseLabels: false
AllowShortBlocksOnASingleLine: false
AllowShortFunctionsOnASingleLine: false
IncludeCategories:
- Regex: '^<'
Priority: 1
- Regex: '^"'
Priority: 2