Merging upstream version 1.45.3+dfsg.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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+# CFL
+
+CFL is a tiny library that provides interfaces for data structures, originally created to satisfy the needs of Fluent Bit and other libraries used internally like CMetrics and CTraces projects.
+
+note: The name doesn't mean anything specific, you can call it `c:\ floppy` if you want.
+
+## Interfaces
+
+- cfl_sds: string manipulation
+- cfl_list: linked list 
+- cfl_kv: key value pairs by using a linked list (cfl_list)
+- cfl_array: array of elements
+- cfl_variant: interface to manage contexts with vairant types
+- cfl_time: time utilities
+- cfl_hash: 64bit hashing functions
+
+## License
+
+This program is under the terms of the [Apache License v2.0](http://www.apache.org/licenses/LICENSE-2.0).
+
+## Authors
+
+Copyright is assigned to the `CFL Authors`, you can see a list of contributors [here](https://github.com/fluent/cfl/graphs/contributors).