Description of problem:
When syncing with compression (-z), certain file types should not be compress during the transfer because they are already compressed. The file types which are not to be compressed can be seen in the man page.
Version-Release number of selected component (if applicable):
All versions since 3.1.0
Steps to Reproduce:
1. run 'rm -f Z ; rsync -azv alpha:z.gz Z'
Transferred data was compressed during the transfer:
sent 43 bytes received 63,873 bytes 25,566.40 bytes/sec
total size is 628,952 speedup is 9.84
No compression should happen.
Note that the source file 'z.gz' was an ascii text file to show clearly that compression took place.