Sync with LibCURL's new generated wrapper

Ref JuliaWeb/LibCURL.jl#102

src/Curl/Curl.jl

@@ -30,8 +30,12 @@ using LibCURL: curl_off_t
 # not exported: https://github.com/JuliaWeb/LibCURL.jl/issues/87
 
 # constants that LibCURL should have but doesn't
-const CURLE_PEER_FAILED_VERIFICATION = 60
-const CURLSSLOPT_REVOKE_BEST_EFFORT = 1 << 3
+if Integer(LibCURL.CURLE_PEER_FAILED_VERIFICATION) != 60
+    const CURLE_PEER_FAILED_VERIFICATION = 60
+end
+if !@isdefined CURLSSLOPT_REVOKE_BEST_EFFORT
+    const CURLSSLOPT_REVOKE_BEST_EFFORT = 1 << 3
+end
 
 using NetworkOptions
 using Base: preserve_handle, unpreserve_handle
@@ -67,9 +71,9 @@ function with_handle(f, handle::Union{Multi, Easy})
     end
 end
 
-setopt(easy::Easy, option::Integer, value) =
+setopt(easy::Easy, option::CURLoption, value) =
     @check curl_easy_setopt(easy.handle, option, value)
-setopt(multi::Multi, option::Integer, value) =
+setopt(multi::Multi, option::CURLMoption, value) =
     @check curl_multi_setopt(multi.handle, option, value)
 
 end # module

src/Curl/utils.jl

@@ -33,7 +33,7 @@ function check(ex::Expr, lock::Bool)
     end
     quote
         r = $ex
-        iszero(r) || @async @error($prefix * string(r))
+        iszero(Integer(r)) || @async @error($prefix * string(r))
         r
     end
 end

src/Downloads.jl

@@ -124,7 +124,7 @@ in which case both the inner and outer code and message may be of interest.
 """
 struct RequestError <: Exception
     url      :: String # original URL
-    code     :: Int
+    code     :: Curl.CURLcode
     message  :: String
     response :: Response
 end

test/runtests.jl

@@ -275,7 +275,7 @@ include("setup.jl")
 
         err = @exception download("$server/status/404")
         @test err isa RequestError
-        @test err.code == 0 && isempty(err.message)
+        @test err.code == Curl.CURLE_OK && isempty(err.message)
         @test err.response.status == 404
         @test contains(err.response.message, r"^HTTP/\d+(?:\.\d+)?\s+404\b")
         @test err.response.proto === "https"