Rust build cleanup

Add Cargo.lock to .gitignore for rust/bssl-crypto and remove generated file
Clean up cargo deny warnings and set reasonable starting point in deny.toml

Change-Id: I0b925408ab6b7947b1b01282bac803feb769421a
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/57985
Reviewed-by: Nabil Wadih <nwadih@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: Bob Beck <bbe@google.com>

.gitignore

diff --git a/.gitignore b/.gitignore
index ac0ede8..3e22141 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,6 +8,7 @@
 doc/*.html
 doc/doc.css
 rust/Cargo.lock
+rust/bssl-crypto/Cargo.lock
 rust/target
 
 util/bot/android_ndk

rust/bssl-crypto/Cargo.lock

diff --git a/rust/bssl-crypto/Cargo.lock b/rust/bssl-crypto/Cargo.lock
deleted file mode 100644
index ed7fe34..0000000
--- a/rust/bssl-crypto/Cargo.lock
+++ /dev/null
@@ -1,14 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-version = 3
-
-[[package]]
-name = "bssl-crypto"
-version = "0.1.0"
-dependencies = [
- "bssl-sys",
-]
-
-[[package]]
-name = "bssl-sys"
-version = "0.1.0"

rust/bssl-crypto/deny.toml

diff --git a/rust/bssl-crypto/deny.toml b/rust/bssl-crypto/deny.toml
index d398485..e521047 100644
--- a/rust/bssl-crypto/deny.toml
+++ b/rust/bssl-crypto/deny.toml
@@ -78,8 +78,6 @@
 allow = [
     "MIT",
     "Apache-2.0",
-    "Apache-2.0 WITH LLVM-exception",
-    "Unicode-DFS-2016",
 ]
 # List of explicitly disallowed licenses
 # See https://spdx.org/licenses/ for list of possible licenses
@@ -88,7 +86,7 @@
     #"Nokia",
 ]
 # Lint level for licenses considered copyleft
-copyleft = "warn"
+copyleft = "deny"
 # Blanket approval or denial for OSI-approved or FSF Free/Libre licenses
 # * both - The license will be approved if it is both OSI-approved *AND* FSF
 # * either - The license will be approved if it is either OSI-approved *OR* FSF
@@ -152,7 +150,7 @@
 # https://embarkstudios.github.io/cargo-deny/checks/bans/cfg.html
 [bans]
 # Lint level for when multiple versions of the same crate are detected
-multiple-versions = "warn"
+multiple-versions = "deny"
 # Lint level for when a crate version requirement is `*`
 wildcards = "allow"
 # The graph highlighting used when creating dotgraphs for crates