deps: add bzip2-rs for bz2 orig tarballs

Decode-only pure-Rust bzip2, matching flate2's pure-Rust default: no
new system packages for building pkh, and the archive-side origin of
the need is the busybox class of '.tar.bz2' upstream tarballs.

Cargo.lock

@@ -155,6 +155,16 @@ version = "1.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fc652a48c352aef3ea3aed32080501cf3ef6ed5da78602a020c991775b0aff04"
 
+[[package]]
+name = "bzip2-rs"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "beeb59e7e4c811ab37cc73680c798c7a5da77fc9989c62b09138e31ee740f735"
+dependencies = [
+ "crc32fast",
+ "tinyvec",
+]
+
 [[package]]
 name = "cc"
 version = "1.5.1"
@@ -1533,6 +1543,7 @@ checksum = "f6b464fbc74e149a392436b17d523f769e057cb6877f6a5c4618bc6f11800548"
 name = "pkh"
 version = "0.2.0"
 dependencies = [
+ "bzip2-rs",
  "chrono",
  "clap",
  "cmd_lib",
@@ -2262,6 +2273,12 @@ dependencies = [
  "zerovec",
 ]
 
+[[package]]
+name = "tinyvec"
+version = "1.13.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fd3ca314f692efd6c868f8408f53fe444634a845f96c028b97d35f6a1f79f0ee"
+
 [[package]]
 name = "tokio"
 version = "1.53.1"

Cargo.toml

@@ -41,6 +41,7 @@ lazy_static = "1.4.0"
 unicode-width = "0.2"
 parking_lot = "0.12"
 suppaftp = "12"
+bzip2-rs = "0.1.2"
 
 [dev-dependencies]
 test-log = "0.2.19"