Log Message:
(www/R-curl) Updated from 4.0 to 4.2 (also fix build on NetBSD/amd64 9.0_BETA)

4.2
 - Fix for old versions of libcurl (build was broken in 4.1 on RHEL / CentOS).
 - Add hostname to timeout errors (#190)

4.1
 - Fixed typechecking code for new internal macro names in libcurl 7.66
 - Rewrite typechecking to work better with clang and old libcurl (#192)
 - has_internet() now checks for connectivity via a proxy server if one is detected
 - Windows: respect the CURL_SSL_BACKEND variable for people that want to use \ 
OpenSSL.
 - Windows: respect CURL_CA_BUNDLE if (and only if) CURL_SSL_BACKEND == openssl
 - curl_download now writes to a temporary file, which is renamed to the destfile
   upon success. This prevents corrupt files when a download fails or is interrupted.
 - Automatically set forbid_reuse = TRUE in curl_echo() handles
 - Update symbol table to 7.66.0