mail/sympa: Update to 6.2.42
* Introduce new option for SQLite support
* Modernize the options regarding the database types
* Define MYSQL and FASTCGI as new default options
While I'm here:
* Fix the license and add the location to the license file
* Convert the usage to GH_TUPLE to USE_GITHUB/GH_ACCOUNT as GH_TUPLE is not
meant for the default distribution file
* Remove no longer required CONFLICTS because mail/sympa5 has been removed
from the Ports tree in 2012
* Remove SUB_LIST because the variables are no longer referenced in one of
the files defined in SUB_FILES
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