sylpheed: update to 3.7.0
sylpheed: update to 3.7.0

- Also add LDAP support to build.

coredumb/void-packages,NeoChontrix/void-packages,necrophcodr/void-packages,necrophcodr/void-packages,coredumb/void-packages,NeoChontrix/void-packages,NeoChontrix/void-packages,coredumb/void-packages,necrophcodr/void-packages,NeoChontrix/void-packages,coredumb/void-packages,necrophcodr/void-packages,NeoChontrix/void-packages,necrophcodr/void-packages,coredumb/void-packages,NeoChontrix/void-packages,coredumb/void-packages