Fix proxmox-backup-client-static compilation

Author: ayufan

dockerfiles/Dockerfile.client

@@ -40,7 +40,7 @@ RUN /scripts/strip-cargo.bash
 RUN /scripts/resolve-dependencies.bash
 
 # Build
-RUN make -C proxmox-backup proxmox-backup-client-static BUILD_MODE=release COMPILEDIR=target/static/release
+RUN make -C proxmox-backup proxmox-backup-client-static BUILD_MODE=release COMPILEDIR=target/static/release CARGO_STATIC_CONFIG=
 
 # Bundle client
 ARG VERSION

repos/patches/proxmox-backup/cargo-config-static.patch

@@ -0,0 +1,13 @@
+diff --git a/debian/rules b/debian/rules
+index 8bc4971b..523fd014 100755
+--- a/debian/rules
++++ b/debian/rules
+@@ -40,7 +40,7 @@ override_dh_auto_configure:
+ 	    die "ERROR: d/changelog <-> Cargo.toml version mismatch: $$v_cargo != $$v_deb\n" if $$v_cargo ne $$v_deb; exit(0); }' Cargo.toml
+ 	#$(CARGO) prepare-debian --help $(CURDIR)/debian/cargo_registry --link-from-system
+ 	# add a new config for static building, sync with Makefile!
+-	cp debian/cargo_home/config.toml debian/cargo_home/config.static.toml
++	cp $(CARGO_HOME)/config.toml debian/cargo_home/config.static.toml
+ 	sed -ri -e 's!^(rustflags = .*)\]$$!\1, "-C", "target-feature=+crt-static", "-L", "$(STATIC_COMPILEDIR)/deps-stubs/"\]!' debian/cargo_home/config.static.toml
+ 	# `cargo build` and `cargo install` have different config precedence, symlink
+ 	# the wrapper config into a place where `build` picks it up as well..