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

--- geoclue-2.1.10/src/gclue-config.c	2015-04-07 09:50:07.721074380 +0200
+++ geoclue-2.1.10/src/gclue-config.c	2015-04-07 10:27:26.613171960 +0200
@@ -235,6 +235,11 @@
 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 == NULL)
+	  config_file_path = CONFIG_FILE_PATH;
 
         config->priv =
                 G_TYPE_INSTANCE_GET_PRIVATE (config,
@@ -242,7 +247,7 @@
                                             GClueConfigPrivate);
         config->priv->key_file = g_key_file_new ();
         g_key_file_load_from_file (config->priv->key_file,
-                                   CONFIG_FILE_PATH,
+                                   config_file_path,
                                    0,
                                    &error);
         if (error != NULL) {
r></table>
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<tr><td><span title='2023-12-16 18:05:58 +0200'>2023-12-16</span></td><td><a href='/guix/commit/tests/go.scm?id=6aade039e1007b5fece031d80aade43e108768a4'>guix: import: Report go version for go importer.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2021-09-28 22:00:47 +0200'>2021-09-28</span></td><td><a href='/guix/commit/tests/go.scm?id=770ae098604d0bd9f21d625e8959e6c7ced3c36f'>tests: go: Fix typo.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-09-01 23:41:42 +0200'>2021-09-01</span></td><td><a href='/guix/commit/tests/go.scm?id=be13e2be08feb88d868f911d8f55b0451fe15e10'>import: go: Improve error handling.</a><span class='msg-avail'>...</span></td><td>zimoun</td></tr>
<tr><td><span title='2021-07-18 01:57:17 -0400'>2021-07-18</span></td><td><a href='/guix/commit/tests/go.scm?id=793ba333c6039545684e8af7e384704e76bc0f2f'>import: go: Upgrade go.mod parser.</a><span class='msg-avail'>...</span></td><td>Sarah Morgensen</td></tr>
<tr><td><span title='2021-07-17 23:26:58 -0400'>2021-07-17</span></td><td><a href='/guix/commit/tests/go.scm?id=3217a04b0352c2dd13323257b369604eeabfccc3'>tests/go: Remove unused variable.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>