Optimized Favicon downloading

Some optimizations in regards to downloading Favicon's.

I also encounterd some issues with accessing some sites where the
connection got dropped or closed early. This seems a reqwest/hyper
thingy, https://github.com/hyperium/hyper/issues/2136. This is now also
fixed.

General:

- Decreased struct size
- Decreased memory allocations
- Optimized tokenizer a bit more to only emit tags when all attributes are there and are valid.

reqwest/hyper connection issue:
The following changes helped solve the connection issues to some sites.
The endresult is that some icons are now able to be downloaded always instead of sometimes.

- Enabled some extra reqwest features, `deflate` and `native-tls-alpn`
  (Which do not bring in any extra crates since other crates already enabled them, but they were not active for Vaultwarden it self)
- Configured reqwest to have a max amount of idle pool connections per host
- Configured reqwest to timeout the idle connections in 10 seconds

1 files changed, 1 insertions, 1 deletions

diff --git a/Cargo.toml b/Cargo.toml
index ce211917..6875db8a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -124,7 +124,7 @@ email_address = "0.2.4"
 handlebars = { version = "4.3.7", features = ["dir_source"] }
 
 # HTTP client (Used for favicons, version check, DUO and HIBP API)
-reqwest = { version = "0.11.18", features = ["stream", "json", "gzip", "brotli", "socks", "cookies", "trust-dns"] }
+reqwest = { version = "0.11.18", features = ["stream", "json", "deflate", "gzip", "brotli", "socks", "cookies", "trust-dns", "native-tls-alpn"] }
 
 # Favicon extraction libraries
 html5gum = "0.5.7"