Print libcurl version on attach

DESCRIPTION

@@ -36,6 +36,6 @@ VignetteBuilder: knitr
 Depends:
     R (>= 3.0.0)
 LazyData: true
-RoxygenNote: 7.1.0
+RoxygenNote: 7.1.1
 Encoding: UTF-8
 Language: en-US

R/onload.R

@@ -14,6 +14,9 @@
   if (grepl("mingw", R.Version()$platform) && !file.exists(get_bundle())){
     warning("No CA bundle found. SSL validation disabled.", call. = FALSE)
   }
+  ssl <- sub("\\(.*\\)\\W*", "", curl_version()$ssl_version)
+  msg <- paste("Using libcurl", curl_version()$version, "with", ssl)
+  packageStartupMessage(msg)
 }
 
 #' @useDynLib curl R_set_bundle

tests/engine.R

@@ -0,0 +1 @@
+library(curl)

tests/engine.Rout.save

@@ -0,0 +1,19 @@
+
+R version 3.5.3 (2019-03-11) -- "Great Truth"
+Copyright (C) 2019 The R Foundation for Statistical Computing
+Platform: x86_64-apple-darwin15.6.0 (64-bit)
+
+R is free software and comes with ABSOLUTELY NO WARRANTY.
+You are welcome to redistribute it under certain conditions.
+Type 'license()' or 'licence()' for distribution details.
+
+R is a collaborative project with many contributors.
+Type 'contributors()' for more information and
+'citation()' on how to cite R or R packages in publications.
+
+Type 'demo()' for some demos, 'help()' for on-line help, or
+'help.start()' for an HTML browser interface to help.
+Type 'q()' to quit R.
+
+> library(curl)
+>