Compression/Decompression Codecs should enforce memory allocation size limits

[Scottmitch]

Expected behavior

To protect against OOME the compression and decompression codecs should explicitly limit the amount of data they compress and decompress. We may be vulnerable to OOME from large or malicious input.

Actual behavior

In light of #5997 most of the compression/decompression codecs don't enforce limits on buffer allocation sizes.

Steps to reproduce

N/A

Minimal yet complete reproducer code (or URL to code)

N/A

Netty version

4.1.7-SNAPSHOT

JVM version (e.g. java -version)

N/A

OS version (e.g. uname -a)

N/A

[Scottmitch]

@normanmaurer @jasobrown - FYI.

[rdicroce]

This should probably be reopened. My PR only fixes this for subclasses of ZlibDecoder; it does not fix this for any other compression algorithms.