skins: Fix use-after-free error
skins: Fix segfault, occurs when the 'Save equalizer preset' dialog gets closed.
       Also set the file name properly.
skins: Set default preset name / extension.
ladspa: aud_config_clear_section forces a re-save; don't use it.
alarm: Don't keep local copies of config strings.
skins: Don't keep local copies of config strings.
aosd: Use new string-pool-based config functions.
Migrate remaining plugins to new string-pool-based config functions.
Use g_ascii_* functions rather than locale-dependent ones.
cdaudio-ng: Handle broken CDs that have CD-Text for some tracks and not others.
sid: Use g_ascii_* function to fix an implicit declaration.