[Varnish] #1566: escape sequence breaks regex

[Varnish]

#1566: escape sequence breaks regex
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 Reporter:  RWOverdijk  |       Owner:  Poul-Henning Kamp <phk@…>
     Type:  defect      |      Status:  closed
 Priority:  normal      |   Milestone:
Component:  build       |     Version:  unknown
 Severity:  normal      |  Resolution:  fixed
 Keywords:              |
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Comment (by Lasse Karstensen <lkarsten@…>):

 In [4e3aa514ecf174bb549e5f0daa0d46957ba196c0]:
 {{{
 #!CommitTicketReference repository=""
 revision="4e3aa514ecf174bb549e5f0daa0d46957ba196c0"
 Escape question marks in C-strings to avoid accidentally generating
 tri-graphs.

 Fixes #1566
 }}}

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Ticket URL: <https://www.varnish-cache.org/trac/ticket/1566#comment:2>
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