[PATCH 1/5] vpn: Fix issue with const return value from strrchr

[Rudi Heitbaum <rudi@heitbaum.com>]

When compiling with recent gcc and glibc-2.43 the --Wdiscarded-qualifiers
warning occurs because with ISO C23, the function strrrchr that return
pointers into their input arrays now have definitions as macros that
return a pointer to a const-qualified type when the input argument is
a pointer to a const-qualified type.

../plugins/vpn.c: In function 'get_ident':                                                                                         ../plugins/vpn.c:170:13: warning: assignment discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]            170 |         pos = strrchr(path, '/');                                                                                                |             ^
---
 plugins/vpn.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/plugins/vpn.c b/plugins/vpn.c
index 332d8e83..1a6b0194 100644
--- a/plugins/vpn.c
+++ b/plugins/vpn.c
@@ -160,9 +160,9 @@ static const char *get_string(struct connman_provider *provider,
 	return g_hash_table_lookup(data->setting_strings, key);
 }
 
-static char *get_ident(const char *path)
+static const char *get_ident(const char *path)
 {
-	char *pos;
+	const char *pos;
 
 	if (*path != '/')
 		return NULL;
@@ -665,7 +665,7 @@ static void add_connection(const char *path, DBusMessageIter *properties,
 {
 	struct connection_data *data;
 	int err;
-	char *ident = get_ident(path);
+	const char *ident = get_ident(path);
 	bool found = false;
 
 	data = g_hash_table_lookup(vpn_connections, ident);
@@ -1092,7 +1092,7 @@ static void configuration_create_reply(DBusPendingCall *call, void *user_data)
 	DBusMessageIter iter;
 	const char *signature = DBUS_TYPE_OBJECT_PATH_AS_STRING;
 	const char *path;
-	char *ident;
+	const char *ident;
 	struct connection_data *data;
 	struct config_create_data *cb_data = user_data;
 
-- 
2.51.0