ci: test on 12.1 and 12.2

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

.cirrus.yml

@@ -1,24 +1,19 @@
 freebsd_task:
     timeout_in: 120m
     install_script:
-    -  ASSUME_ALWAYS_YES=yes pkg bootstrap -f ; pkg install -y bash iperf3 wireguard-tools
-    - fetch https://download.freebsd.org/ftp/releases/$(uname -m)/$(uname -r)/src.txz
-    - tar -C / -x -f src.txz
+    - ASSUME_ALWAYS_YES=yes pkg bootstrap -f && pkg install -y bash iperf3 wireguard-tools
     build_script:
     - make -j $(sysctl -n hw.ncpu) -C src DEBUG_FLAGS=-DSELFTESTS
     test_script:
     - kldload src/if_wg.ko
     - tests/netns.sh
     matrix:
-    # bash fails on 11 and 12 with undefined symbols (e.g.
-    # "rl_executing_keyseq" referenced from COPY relocation in
-    # /usr/local/bin/bash) so skip for now.
-    #- name: freebsd11-amd64
-    #  freebsd_instance:
-    #    image: freebsd-11-2-release-amd64
-    #- name: freebsd12-amd64
-    #  freebsd_instance:
-    #    image: freebsd-12-0-release-amd64
-    - name: freebsd13-amd64
+    - name: freebsd12-1-amd64
+      freebsd_instance:
+        image: freebsd-12-1-release-amd64
+    - name: freebsd12-2-amd64
+      freebsd_instance:
+        image: freebsd-12-2-release-amd64
+    - name: freebsd13-0-amd64
       freebsd_instance:
         image: freebsd-13-0-release-amd64

README.md

@@ -4,9 +4,15 @@ This is a kernel module for FreeBSD to support [WireGuard](https://www.wireguard
 
 ### Installation instructions
 
-First make sure you have the latest net/wireguard package installed, version ≥1.0.20210315.
+Snapshots of this may be installed from packages:
 
-Then, on FreeBSD 12 & 13:
+```
+# pkg install wireguard
+```
+
+### Building instructions
+
+If you'd prefer to build this repo from scratch, rather than using a package, first make sure you have the latest net/wireguard-tools package installed, version ≥1.0.20210424. Then, on FreeBSD 12.1, 12.2, and 13.0:
 
 ```
 # git clone https://git.zx2c4.com/wireguard-freebsd