filebrowser: disable pcre jit to avoid crash

filebrowser/rootfs/etc/nginx/nginx.conf

@@ -12,7 +12,9 @@ pid /var/run/nginx.pid;
 worker_processes 1;
 
 # Enables the use of JIT for regular expressions to speed-up their processing.
-pcre_jit on;
+# Disabled for compatibility with CPUs that do not support PCRE JIT, which caused
+# crashes on some systems (see issue #1993).
+pcre_jit off;
 
 # Write error log to Hass.io add-on log.
 error_log /proc/1/fd/1 error;