Added release notes for version 1.2.7, including updates on pkg-config usage and configuration options.
+## Version 1.2.7
+* With this update, `pkg-config` is used to determine the correct location for `systemdsystemunitdir`.
+* Additionally, `--with-systemdsystemunitdir` `./configure...` option is added to allow the location to be over-ridden.
+
+**Note** If you are updating an existing installation, you'll need to delete the existing service file as directed in the [README](https://github.com/mikebrady/nqptp/blob/main/README.md#remove-old-service-files).
+
+Thanks to [Chris Boot](https://github.com/bootc) for the [PR](https://github.com/mikebrady/nqptp/pull/46).
+
## Version 1.2.6
* This update should make synchronisation a little better and a little smoother.