+=libidn2=
+ Provides IDNA support in URLs (fallback if libidn is not available).
+ Minimum version: none
+ Install on Debian: `apt-get install libidn2-0-dev`
+
+=libicu=
+ Provides IDNA support in URLs (fallback if libidn is not available).
+ Minimum version: none
+ Install on Debian: `apt-get install libicu-dev`
+