Icon and SMTP Debug fixes.

- We need to add some feature to enable smtp debugging again. See: lettre/lettre#584
- Upstream added the fallback icon again, probably because of caching ;). See: bitwarden/server#1149
- Enabled gzip and brotli compression support with reqwest. Some sites seem to force this, or assume that because of the User-Agent string it is supported. This caused some failed icons.

Fixes dani-garcia#1540

Cargo.toml

@@ -32,7 +32,7 @@ rocket = { version = "0.5.0-dev", features = ["tls"], default-features = false }
 rocket_contrib = "0.5.0-dev"
 
 # HTTP client
-reqwest = { version = "0.11.2", features = ["blocking", "json"] }
+reqwest = { version = "0.11.2", features = ["blocking", "json", "gzip", "brotli"] }
 
 # multipart/form-data support
 multipart = { version = "0.17.1", features = ["server"], default-features = false }
@@ -99,11 +99,12 @@ num-traits = "0.2.14"
 num-derive = "0.3.3"
 
 # Email libraries
+tracing = { version = "0.1", features = ["log"] } # Needed to have lettre trace logging used when SMTP_DEBUG is enabled.
 lettre = { version = "0.10.0-beta.3", features = ["smtp-transport", "builder", "serde", "native-tls", "hostname", "tracing"], default-features = false }
 newline-converter = "0.2.0"
 
 # Template library
-handlebars = { version = "3.5.3", features = ["dir_source"] }
+handlebars = { version = "3.5.4", features = ["dir_source"] }
 
 # For favicon extraction from main website
 html5ever = "0.25.1"