Add connection test if resolver force EDNS for large replies

[SH]

$ dig +short txt aexp.com
"MS=A03831B3DC53B3A22A378DBEAFC621C3CBAD1E9C"
"MS=ms41587958"
"v=spf1 ip4:148.173.88.29 ip4:148.173.88.30/31 ip4:148.173.88.32/30 ip4:148.173.88.36 ip4:148.173.96.171 ip4:148.173.96.172/30 ip4:148.173.96.176/31" " ip4:148.173.96.178 ip4:193.109.254.0/23 ip4:12.29.102.152/29 ip4:216.82.240.0/20 ip4:67.219.240.0/20 ip4:85.158.136.0/21 ip4:95.131.104.0/21 ip4:194.106.220.0/23 ip4:195.245.230.0/23 ip4:103.9.96.0/22 exists:%{ir}.spf.%{d} include:spf1.aexp.com -all"

vs.

$ dig txt +short +noedns aexp.com
"MS=ms41587958"
"MS=A03831B3DC53B3A22A378DBEAFC621C3CBAD1E9C"

(bare node can't work with edns)