Use all DNS servers at once, query DNS in correct order, return HTTP:…

…:Conn from Client::send(), Fix for ACMEv2::Account

Use all DNS servers at once, query DNS in correct order, return HTTP:…

…:Conn from Client::send(), Fix for ACMEv2::Account

Option constraints and help

Merge pull request #159 from marcosfrm/fix-libdeps

DEB: fix library dependencies

Merge pull request #157 from marcosfrm/system-lz4

Allow linking system lz4

Fix for DNS response handling

Fix for DNS response handling

Spelling fixes

Merge pull request #156 from hpmachining/master

Fix for api change to ScriptOrigin() in V8 12.7

Don't allow negative number strings to pass for unsigned