Merge pull request #4359 from libgit2/cmn/proxy-options-free

Plug some leaks in curl's proxy handling

src/curl_stream.c

@@ -195,6 +195,7 @@ static int curls_set_proxy(git_stream *stream, const git_proxy_options *proxy_op
 	CURLcode res;
 	curl_stream *s = (curl_stream *) stream;
 
+	git_proxy_options_clear(&s->proxy);
 	if ((error = git_proxy_options_dup(&s->proxy, proxy_opts)) < 0)
 		return error;
 
@@ -295,6 +296,8 @@ static void curls_free(git_stream *stream)
 
 	curls_close(stream);
 	git_strarray_free(&s->cert_info_strings);
+	git_proxy_options_clear(&s->proxy);
+	git_cred_free(s->proxy_cred);
 	git__free(s);
 }
 

src/proxy.c

@@ -31,3 +31,9 @@ int git_proxy_options_dup(git_proxy_options *tgt, const git_proxy_options *src)
 
 	return 0;
 }
+
+void git_proxy_options_clear(git_proxy_options *opts)
+{
+	git__free((char *) opts->url);
+	opts->url = NULL;
+}

src/proxy.h

@@ -12,5 +12,6 @@
 #include "git2/proxy.h"
 
 extern int git_proxy_options_dup(git_proxy_options *tgt, const git_proxy_options *src);
+extern void git_proxy_options_clear(git_proxy_options *opts);
 
 #endif