These do not require GLib anymore.

Don't use GLib.

Eliminate duplicate SidTune construction.

Remove our own songlength database parser.

Eliminates duplicate ParseContainerPath() call.

Replaces g_ascii_strup() and allows building the Vorbis encoder
without GLib.

Replaces GLib's g_strsplit().

Use simple string and path parsing functions instead of GLib's
g_pattern_match(), which was used in a very clumsy way.

There is duplicate code in the two.