[MacPorts] #47290: digikam: Add variant for external mysql database; rename variant for internal mysql database; update mysql dependency

[MacPorts]

#47290: digikam: Add variant for external mysql database; rename variant for
internal mysql database; update mysql dependency
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  Reporter:  sk-public@…  |      Owner:  macports-tickets@…
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.3.3
Resolution:               |   Keywords:  haspatch
      Port:  digikam      |
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Comment (by sk-public@…):

 I uploaded digikam-mysql-2015-04-14.diff​, with mysql51_external,
 mysql55_external, mysql56_external, and mariadb_external variants, all of
 which enable support for external MySQL databases (as opposed to the
 default builtin SQLite). I've tested by building with the mysql56_external
 variant.

 The patch also renames the mysql_check variant to mysql_internal, which
 better describes what that variant does (allow use of an internal MySQL
 database), and distinguishes it from the _external variants. However, I
 don't use that capability. I'm not even sure why it's necessary -- I built
 it by accident because I thought it might re-enable support for external
 MySQL databases.  It doesn't. I think it should be renamed to
 mysql_internal to prevent that confusion.  I did changed it to look for
 bin/mysql_config instead of mysql_config5. The former is created by port
 select --set mysql mysql5_, I don't think anything provides mysql_config5.

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Ticket URL: <https://trac.macports.org/ticket/47290#comment:4>
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