[Pidgin] #16570: Pidgin is not able to select dictionaries with non standard format

[Pidgin]

#16570: Pidgin is not able to select dictionaries with non standard format
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 Reporter:  chaosguard  |      Owner:  EionRobb
     Type:  defect      |     Status:  new
Milestone:              |  Component:  unclassified
  Version:  2.10.11     |   Keywords:
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 '''Problem'''

 When I download and place the de_DE_frami.dic an de_DE_frami.aff files
 under the proper install dir (`C:\Program Files
 (x86)\Pidgin\spellcheck\share\enchant\myspell`) pidgin will fail to load
 them resulting in spellchecking to be unavailable. When I rename the files
 to de_DE.dic and de_DE.aff everything works fine.

 '''Solution'''
 1. Add a clever autoselection which can handle such cases
 2. Use the openoffice `dictionary.lst` to identify which files shall be
 used. Such a file is already present in my installation so I guess it
 ships with pidgin. Example entry which would solve the problem for german

 {{{
 DICT de DE de_DE_frami
 }}}

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Ticket URL: <https://developer.pidgin.im/ticket/16570>
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