Rollup merge of #43462 - dhduvall:solaris-libresolv, r=aturon
Rollup merge of #43462 - dhduvall:solaris-libresolv, r=aturon

DNS functions are in libresolv on Solaris, just like on MacOS

graydon/rust,aidancully/rust,GBGamer/rust,graydon/rust,GBGamer/rust,GBGamer/rust,GBGamer/rust,GBGamer/rust,graydon/rust,GBGamer/rust,graydon/rust,aidancully/rust,graydon/rust,GBGamer/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,GBGamer/rust,aidancully/rust