!misc: project refactor and new module structure

New crates:
 - nginx-sys - is a separate crate for nginx bindings
 - ngx - crate allows to use a higher-level abstractions to build modules in rust
- examples - a number of examples how to develop nginx dynamic modules with Rust

ngx v0.3.0-beta now has more rust idiomatic code and allows to build modules completely in rust without any C code

Co-authored-by: Matthew Yacobucci <[email protected]> Elijah Zupancic <[email protected]>

Author: ivanitskiy

.cargo/audit.toml

@@ -0,0 +1,35 @@
+# audit config file
+#
+# It may be located in the user home (`~/.cargo/audit.toml`) or in the project
+# root (`.cargo/audit.toml`).
+#
+# All of the options which can be passed via CLI arguments can also be
+# permanently specified in this file.
+# It may be located in the user home (`~/.cargo/audit.toml`) or in the project
+# root (`.cargo/audit.toml`).
+
+[advisories]
+ignore = ["RUSTSEC-2020-0071"]
+
+# # Advisory Database Configuration
+# [database]
+# path = "~/.cargo/advisory-db" # Path where advisory git repo will be cloned
+# url = "https://github.com/RustSec/advisory-db.git" # URL to git repo
+# fetch = true # Perform a `git fetch` before auditing (default: true)
+# stale = false # Allow stale advisory DB (i.e. no commits for 90 days, default: false)
+
+# # Output Configuration
+# [output]
+# deny = ["unmaintained"] # exit on error if unmaintained dependencies are found
+# format = "terminal" # "terminal" (human readable report) or "json"
+# quiet = false # Only print information on error
+# show_tree = true # Show inverse dependency trees along with advisories (default: true)
+
+# # Target Configuration
+# [target]
+# arch = "x86_64" # Ignore advisories for CPU architectures other than this one
+# os = "linux" # Ignore advisories for operating systems other than this one
+
+# [yanked]
+# enabled = true # Warn for yanked crates in Cargo.lock (default: true)
+# update_index = true # Auto-update the crates.io index (default: true)

.cargo/config.toml

@@ -0,0 +1,8 @@
+#
+# https://stackoverflow.com/questions/28124221/error-linking-with-cc-failed-exit-code-1
+#
+[target.x86_64-apple-darwin]
+rustflags = [
+  "-C", "link-arg=-undefined",
+  "-C", "link-arg=dynamic_lookup",
+]

.dockerignore

@@ -0,0 +1,24 @@
+**/.idea
+.cargo
+.dockerignore
+.fossa.yml
+.git
+.github
+CHANGELOG.md
+CODE_OF_CONDUCT.md
+CONTRIBUTING.md
+Containerfile.debian
+Dockerfile
+GNUmakefile
+LICENSE.txt
+README.md
+SECURITY.md
+build
+
+.vscode/**
+
+**/target
+target
+
+.cache/
+.nginx/

.fossa.yml

@@ -0,0 +1,11 @@
+version: 3
+
+project:
+  id: github.com/nginxinc/ngx-rust
+  name: ngx-rust
+  url: github.com/nginxinc/ngx-rust
+
+paths:
+  exclude:
+    - ./cache
+    - ./nginx