* mbsync: Add NEWS entry about isync 1.5.0 changes
* mbsync: Place config file in $XDG_CONFIG_HOME
mbsync 1.5.0 supports placing isync's configuration file in
$XDG_CONFIG_HOME/isyncrc [1].
[1] https://sourceforge.net/projects/isync/files/isync/1.5.0/
* mbsync: Replace SSLType with TLSType
mbsync 1.5.0 replaced the name of the configuration option [1].
Also update SSLVersions to TLSVersions for the same reason. Inform the
user if the option was renamed.
[1] https://sourceforge.net/projects/isync/files/isync/1.5.0/
* mbsync: Replace SSLVersions with TLSVerisons
* mbsync: Update extraConfig.account example with SSL->TLS changes
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