PlatformNotSupportedException thrown when using libcurl <= 7.29.0 and OpenSSL

On a host that has curl built without OpenSSL, N1QL query throws following exception.

System.PlatformNotSupportedException: The libcurl library in use (7.29.0) and its SSL backend ("NSS/3.21 Basic ECC") do not support custom handling of certificates. A libcurl built with OpenSSL is required.

This is due to https://github.com/couchbase/couchbase-net-client/blob/master/Src/Couchbase/N1QL/QueryClient.cs#L393, which calls System.Net.Http.HttpClient.PostAsync that requires libcurl with OpenSSL.

Workaround is to upgrade libcurl to later than 7.29.0.

On CentOS, since 7.29.0 is the latest, download and install

ftp://ftp.pbone.net/mirror/ftp5.gwdg.de/pub/opensuse/repositories/home:/Scott_Cantor/CentOS_7/x86_64/libcurl-openssl-7.43.0-1.1.x86_64.rpm

with yum. Example is 

'yum install libcurl-openssl-7.43.0-1.1.x86_64.rpm'

which will install a single file /opt/shibboleth/lib64/libcurl.so.4.3.0 and a symbolic link.

Then replace /usr/lib64/libcurl.so.4.3.0 with /opt/shibboleth/lib64/libcurl.so.4.3.0 or do whatever symbolic link that will invoke new libcurl.so.4.3.0