Where do they say that it being part of the standard library is unique? I don't even see the words "standard library" mentioned.
EDIT: Look, this back and forth seems kind of pointless. This started with a statement about Go being unique for being able to be statically linked and talk HTTPS. If a language can be linked to compiled libraries, static or not, it's surely able to at least use libcurl, so I and the other commenter you replied to took it as Go is unique for being able to link statically. I assumed they meant, ignoring C/C++, static linking is rare, which I found interesting. I found other languages and asked for clarification. That's all.