Don't use deprecated constants

Follow up for PR #4917.

Signed-off-by: Sven Strickroth <email@cs-ware.de>

src/streams/socket.c

@@ -38,7 +38,7 @@ static void net_set_error(const char *str)
 		git_error_set(GIT_ERROR_NET, "%s: %s", str, win32_error);
 		git__free(win32_error);
 	} else {
-		git_error_set(GITERR_NET, "%s", str);
+		git_error_set(GIT_ERROR_NET, "%s", str);
 	}
 }
 #else

src/transports/winhttp.c

@@ -719,7 +719,7 @@ static void CALLBACK winhttp_status(
 	else if ((status & WINHTTP_CALLBACK_STATUS_FLAG_SECURITY_CHANNEL_ERROR))
 		git_error_set(GIT_ERROR_NET, "security libraries could not be loaded");
 	else
-		git_error_set(GITERR_NET, "unknown security error %lu", status);
+		git_error_set(GIT_ERROR_NET, "unknown security error %lu", status);
 }
 
 static int winhttp_connect(
@@ -1142,7 +1142,7 @@ replay:
 		}
 
 		if (HTTP_STATUS_OK != status_code) {
-			git_error_set(GITERR_NET, "request failed with status code: %lu", status_code);
+			git_error_set(GIT_ERROR_NET, "request failed with status code: %lu", status_code);
 			return -1;
 		}