radicale: change to python3

Also suggest migration to radicale2.

Signed-off-by: Nathan Owens <ndowens04@gmail.com>

srcpkgs/radicale/INSTALL.msg

@@ -0,0 +1,20 @@
+You are installing the legacy version of radicale (1.x)!
+Please install the radicale2 package for the latest (2.x) version.
+
+If you need to migrate data, take the following steps:
+
+- Disable the radicale 1.x service ("radicale")
+- Back up the radicale 1.x collections currently in /var/lib/radicale
+- Remove the old collections so they do not conflict with radicale 2.x
+- Export the backup radicale 1.x collections in the 2.x format to /var/lib/radicale
+  (see the radicale 1.x --export-storage CLI argument)
+- Remove the radicale 1.x package ("radicale")
+- Install radicale 2.x package ("radicale2")
+- Enable the radicale 2.x service ("radicale")
+- Confirm that the radicale 2.x service is functioning correctly and reliably
+- Remove the backup radicale 1.x collections
+
+Consider using the following resources for further guidance:
+
+- Official radicale migration guide: https://radicale.org/1to2/.
+- Void Linux Handbook, "Managing Services" section: https://docs.voidlinux.org/config/services/managing.html

srcpkgs/radicale/template

@@ -1,13 +1,13 @@
 # Template file for 'radicale'
 pkgname=radicale
 version=1.1.6
-revision=2
+revision=3
 archs=noarch
 wrksrc="Radicale-${version}"
-build_style=python2-module
+build_style=python3-module
 pycompile_module="radicale"
-hostmakedepends="python python-setuptools"
+hostmakedepends="python3 python3-setuptools"
-depends="python-pam python-requests python-dulwich"
+depends="python3-pam python3-requests python3-dulwich"
 short_desc="Complete calendar and contact storing and manipulating solution"
 maintainer="lemmi <lemmi@nerd2nerd.org>"
 license="GPL-3.0-or-later"