Log Message:
(www/R-curl) Updated 6.0.1 to 6.1.0

6.1.0
 - Fix a rchk bug
 - Enable CURLOPT_PIPEWAIT by default to prefer multiplex when possible
 - Enable setting max_streams in multi_set(), default to 10
 - Allow open(curl::curl()) to be interrupted
 - Interrupting a download no longer causes an error (#365)