Error message was 'too few arguments for "find"' because the "base"
constraint was not supported, and no other constraints remained.

Fixes clang warning.

Restores the features from the previous draft commands "findin" /
"searchin".

According to the protocol documentation, matching the file name was
wrong.  This removes some awkward special-case code.

Replaces GLib's g_ascii_strcasecmp().

Implement Mantis ticket 0003646.

Merge locate_song_search() and locate_song_match().

Fold the case during construction, without having to create another
copy.

Convert a string into a tag_type enum.

After we've been hit by Large File Support problems several times in
the past week (which only occur on 32 bit platforms, which I don't
have), this is yet another attempt to fix the issue.

Convert a string into a tag_type enum.

strcasecmp() is locale dependent, making it a bad choice for internal
string comparisons.

This updates the copyright header to all be the same, which is
pretty much an update of where to mail request for a copy of the GPL
and the years of the MPD project. This also puts all committers under
'The Music Player Project' umbrella. These entries should go
individually in the AUTHORS file, for consistancy.

There's no point in declaring num_items as a uint8_t, it doesn't save
any space, due to padding.  This allows us to lift the articial "255
items" limitation.

Renamed numOfItems to num_items.

On some platforms, g_free() must be used for memory allocated by
GLib.  This patch intends to correct a lot of occurrences, but is
probably not complete.

Merged casefolding code from two locations into this one library
function.

Changed the function prototypes to get locate_item_list objects
instead of num_items/items.