sqlite3: add configure switches to menuselect

Adds (most) configure switches to menuselect. The defaults are _not_
changed, meaning the default configuration itself remains the same.

This enables changing the configuration through menuselect and adds
flags that other packages may use.

Config.in is renamed to Config-lib.in in anticipation of a future commit
where the cli tool package also gets a file to source.

The variables also get a prefix change from SQLITE to SQLITE3 in case
there will be a new major release in the future that may coexist with
sqlite3.

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>

libs/sqlite3/Config-lib.in

@@ -0,0 +1,53 @@
+menu "Configuration"
+	depends on PACKAGE_libsqlite3
+
+config SQLITE3_DYNAMIC_EXTENSIONS
+	bool "Dynamic extensions"
+	default y
+	help
+	  Enable loadable extensions.
+
+config SQLITE3_FTS3
+	bool "FTS3 support"
+	default y
+	help
+	  Enable FTS3 support.
+
+config SQLITE3_FTS4
+	bool "FTS4 support"
+	depends on SQLITE3_FTS3
+	default y
+	help
+	  Enable FTS4 support.
+
+config SQLITE3_FTS5
+	bool "FTS5 support"
+	default y
+	help
+	  Enable FTS5 support.
+
+config SQLITE3_JSON1
+	bool "JSON1 extension"
+	default y
+	help
+	  Include JSON1 support. This is the default.
+
+config SQLITE3_RTREE
+	bool "R-Tree support"
+	default y
+	help
+	  Enable R-Tree support.
+
+config SQLITE3_SESSION
+	bool "Session extension"
+	default n
+	help
+	  Enable the session extension (default no).
+
+config SQLITE3_THREADSAFE
+	bool "Thread-safe library"
+	default y
+	help
+	  Build a thread-safe library.
+
+endmenu