fix: temporarily disable building and testing on FreeBSD

CI is currently failing due to [1] and [2], and they are not getting
merged upstream due to [3] being required first. We have to reenable
this once this is resolved.

[1]: cross-rs/cross#613
[2]: cross-rs/cross#620
[3]: cross-rs/cross#609

.github/workflows/ci.yml

@@ -102,10 +102,15 @@ jobs:
           target: "x86_64-pc-windows-gnu"
           use-cross: true
           continue-on-error: false
-        - rust: stable
-          target: "x86_64-unknown-freebsd"
-          use-cross: true
-          continue-on-error: false
+        # FIXME: reenable freebsd building/CI
+        #        This is blocked by:
+        #        - https://github.com/cross-rs/cross/pull/613
+        #        - https://github.com/cross-rs/cross/pull/620
+        #        NOTE: enable in bors.toml again, too!
+        # - rust: stable
+        #   target: "x86_64-unknown-freebsd"
+        #   use-cross: true
+        #   continue-on-error: false
 
     steps:
     - name: Checkout
@@ -399,6 +404,12 @@ jobs:
         exit "$exit_code"
 
   integration-test-freebsd:
+    # FIXME: reenable freebsd building/CI
+    #        This is blocked by:
+    #        - https://github.com/cross-rs/cross/pull/613
+    #        - https://github.com/cross-rs/cross/pull/620
+    #        NOTE: enable in bors.toml again, too!
+    if: 'false'
     runs-on:
       # The FreeBSD tests run on macOS because there are no FreeBSD runners available from GitHub,
       # and macOS is the only environment where nested virtualization can be used.

bors.toml

@@ -2,11 +2,11 @@ status = [
     "build (1.40.0, x86_64-unknown-linux-gnu, false, false)",
     "build (stable, x86_64-unknown-linux-gnu, false, false)",
     "build (beta, x86_64-unknown-linux-gnu, false, false)",
-    "build (stable, x86_64-unknown-freebsd, true, false)",
+    # "build (stable, x86_64-unknown-freebsd, true, false)",
     "build (stable, x86_64-unknown-linux-musl, false, false)",
     "build (stable, x86_64-pc-windows-gnu, true, false)",
     "integration-test-linux",
-    "integration-test-freebsd",
+    # "integration-test-freebsd",
     "integration-test-windows",
     "rustfmt",
     "clippy",