Make novendor feature the default

See: libbpf/libbpf-sys#64

The "static" feature will now get libbpf-sys to do all the static compilation
of the libraries required by libbpf rather than the application developer
statically compiling these libraries themselves, or relying on the
distribution to provide static versions.

The default feature will no longer link libbpf statically.  All libbpf
libraries, including libbpf, will now be dynamically linked to
distribution provided shared libraries

CHANGELOG NOTE #1: feature "static" allows libelf and zlib to be statically
linked. Completely static binaries can now be compiled via the command
`RUSTFLAGS='-C target-feature=+crt-static' cargo build --target
x86_64-unknown-linux-gnu`.
CHANGELOG NOTE #2: "static" feature will not work with musl.

Signed-off-by: Michael Mullin <[email protected]>

libbpf-rs/Cargo.toml

@@ -15,9 +15,8 @@ keywords = ["bpf", "ebpf", "libbpf"]
 maintenance = { status = "actively-developed" }
 
 [features]
-# When turned on, link against system-installed libbpf instead of building
-# and linking against vendored libbpf sources
-novendor = ["libbpf-sys/novendor"]
+# When turned on, compile and link all libbpf library dependencies statically
+# When turned off, dynamically link all libbpf library dependencies
 static = ["libbpf-sys/static"]
 
 [dependencies]