Allow the configuration file to be specified via an environment variable.

diff --git a/src/gclue-config.c b/src/gclue-config.c
index 7ab2a67..e41f3df 100644
--- a/src/gclue-config.c
+++ b/src/gclue-config.c
@@ -332,6 +332,11 @@ static void
 gclue_config_init (GClueConfig *config)
 {
         GError *error = NULL;
+	const char *config_file_path;
+
+	config_file_path = g_getenv ("GEOCLUE_CONFIG_FILE");
+	if (!config_file_path)
+            config_file_path = CONFIG_FILE_PATH;
 
         config->priv = gclue_config_get_instance_private(config);
         config->priv->key_file = g_key_file_new ();
@@ -341,7 +346,7 @@ gclue_config_init (GClueConfig *config)
                                    &error);
         if (error != NULL) {
                 g_critical ("Failed to load configuration file '%s': %s",
-                            CONFIG_FILE_PATH, error->message);
+                            config_file_path, error->message);
                 g_error_free (error);
 
                 return;
r></table>
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<tr><th>author</th><td>Liliana Marie Prikler &lt;liliana.prikler@gmail.com&gt;</td><td class='right'>2023-09-09 12:22:14 +0200</td></tr>
<tr><th>committer</th><td>Liliana Marie Prikler &lt;liliana.prikler@gmail.com&gt;</td><td class='right'>2023-09-09 12:22:14 +0200</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/guix/commit/gnu?id=94ca5b4357af8f8921f0cb0873a7cf316f13aa69'>94ca5b4357af8f8921f0cb0873a7cf316f13aa69</a> (<a href='/guix/patch/gnu?id=94ca5b4357af8f8921f0cb0873a7cf316f13aa69'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/guix/tree/?id=94ca5b4357af8f8921f0cb0873a7cf316f13aa69'>6ef30120737f26f298f7f17d86597b0b729517e0</a> /<a href='/guix/tree/gnu?id=94ca5b4357af8f8921f0cb0873a7cf316f13aa69'>gnu</a></td></tr>
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<div class='commit-subject'>Merge branch 'master' into emacs-team</div><div class='commit-msg'></div><div class='diffstat-header'><a href='/guix/diff/?id=94ca5b4357af8f8921f0cb0873a7cf316f13aa69'>Diffstat</a> (limited to 'gnu')</div><table summary='diffstat' class='diffstat'>