Macro recursion decrease and other optimizations

- Decreased `recursion_limit` from 512 to 87
  Mainly done by optimizing the config macro's.
  This fixes an issue with the rust-analyzer which doesn't go beyond 128
- Removed Regex for masking sensitive values and replaced it with a map()
  This is much faster then using a Regex.
- Refactored the get_support_json macro's
- All items above also lowered the binary size and possibly compile-time
- Removed `_conn: DbConn` from several functions, these caused unnecessary database connections for functions who didn't used that at all
- Decreased json response for `/plans`
- Updated libraries and where needed some code changes
  This also fixes some rare issues with SMTP https://github.com/lettre/lettre/issues/678
- Using Rust 2021 instead of 2018
- Updated rust nightly

docker/amd64/Dockerfile.alpine

@@ -27,7 +27,7 @@
 FROM vaultwarden/web-vault@sha256:0e8daf80abb73ebca69d1971847450d24da45a74a525fd643246ee1dfa02108b as vault
 
 ########################## BUILD IMAGE  ##########################
-FROM clux/muslrust:nightly-2021-10-06 as build
+FROM clux/muslrust:nightly-2021-10-23 as build
 
 # Alpine-based AMD64 (musl) does not support mysql/mariadb during compile time.
 ARG DB=sqlite,postgresql

docker/amd64/Dockerfile.buildx.alpine

@@ -27,7 +27,7 @@
 FROM vaultwarden/web-vault@sha256:0e8daf80abb73ebca69d1971847450d24da45a74a525fd643246ee1dfa02108b as vault
 
 ########################## BUILD IMAGE  ##########################
-FROM clux/muslrust:nightly-2021-10-06 as build
+FROM clux/muslrust:nightly-2021-10-23 as build
 
 # Alpine-based AMD64 (musl) does not support mysql/mariadb during compile time.
 ARG DB=sqlite,postgresql