[Pidgin] #9875: Rename purple_connection_error_reason() to purple_connection_error()

[Pidgin]

#9875: Rename purple_connection_error_reason() to purple_connection_error()
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 Reporter:  MarkDoliner  |     Owner:     
     Type:  task         |    Status:  new
Component:  libpurple    |   Version:     
 Keywords:               |  
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 Remove the old purple_connection_error() function, rename
 purple_connection_error_reason() to just purple_connection_error(), and
 change it to take in va_args and format the error message itself.

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Ticket URL: <http://developer.pidgin.im/ticket/9875>
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