rename posterg → xamxam throughout: nginx conf, scripts, PHP source, docs

app/public/live-reload.php

@@ -38,7 +38,7 @@ foreach ($watchDirs as $dir) {
 }
 
 $fingerprint = md5($hash);
-$stateFile = sys_get_temp_dir() . '/posterg-live-reload.txt';
+$stateFile = sys_get_temp_dir() . '/xamxam-live-reload.txt';
 
 $prev = file_exists($stateFile) ? file_get_contents($stateFile) : null;
 // First visit: write baseline, don't fire a reload