wireprotov1server: use binascii.unhexlify
The "hex" codec doesn't exist in Python 3. We could use
`codecs.decode(h, 'hex_codec')`. But `binascii.unhexlify()`
exists and should work the same on Python 2 and 3.
Differential Revision: https://phab.mercurial-scm.org/D5755
BasedOnStyle: LLVM
IndentWidth: 8
UseTab: ForIndentation
BreakBeforeBraces: Linux
AllowShortIfStatementsOnASingleLine: false
IndentCaseLabels: false
AllowShortBlocksOnASingleLine: false
AllowShortFunctionsOnASingleLine: false
IncludeCategories:
- Regex: '^<'
Priority: 1
- Regex: '^"'
Priority: 2