gradlew-fdroid: avoid sed
gradlew-fdroid: avoid sed

sed implementations (GNU sed vs. BSD sed) have variations in regex
syntax causing distributionUrl parsing to fail on macOS.

f-droid/fdroid-server,f-droid/fdroid-server,fdroidtravis/fdroidserver,fdroidtravis/fdroidserver,f-droid/fdroidserver,f-droid/fdroid-server,f-droid/fdroid-server,fdroidtravis/fdroidserver,f-droid/fdroidserver,f-droid/fdroidserver,f-droid/fdroidserver,fdroidtravis/fdroidserver,f-droid/fdroidserver,f-droid/fdroid-server