BIND 10 #1194: Use pkg-config for botan

[BIND 10 Development]

#1194: Use pkg-config for botan
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            Reporter:  vorner        |                        Owner:
                Type:  defect        |  UnAssigned
            Priority:  major         |                       Status:  new
           Component:  build system  |                    Milestone:  New
           Sensitive:  0             |  Tasks
         Sub-Project:  DNS           |                     Keywords:
Estimated Difficulty:  0             |              Defect Severity:  N/A
         Total Hours:  0             |  Feature Depending on Ticket:
                                     |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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 Starting with botan-1.10, it seems botan-config no longer works. See
 https://bugs.gentoo.org/show_bug.cgi?id=380481.

 The recommended way seems to be to use pkg-config, so we should update (or
 try both and see which one of them works).

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Ticket URL: <http://bind10.isc.org/ticket/1194>
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BIND 10 Development