Any idea what this (https://github.com/iotaledger/ccurl/blob/master/src/lib/curl.c#L74 https://github.com/iotaledger/ccurl/blob/master/src/lib/curl...) is for i

Any idea what this (https://github.com/iotaledger/ccurl/blob/master/src/lib/curl.c#L74 https://github.com/iotaledger/ccurl/blob/master/src/lib/curl...) is for in their c implementation?