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Description of problem:
Cyrus-imapd failed to start on our systems, reporting failure when "preparing databases".  I discovered that the problem was that /usr/lib/cyrus-imapd/cvt_cyrusdb_all misidentified skiplist files.  

Version-Release number of selected component (if applicable):
cyrus-imapd-2.2.12-1.1.fc3

How reproducible:
Always

Steps to Reproduce:
1.  Ensure that your system magic file contains the line:

4       string          skip            Apple QuickTime movie (modified)

2. Try to start cyrus-imapd using the init.d script (altnernatively, try to run /usr/lib/cyrus-imapd/cvt_cyrusdb_all).    

Actual Results:  cvt_cyrusdb_all fails, causing the startup script to fail.

Expected Results:  It should have realized that the "seen" files were skiplist files and moved on.

Additional info:

The fix is easy: change "$system_magic:$cyrus_magic" on line 144 to "$cyrus_magic:$system_magic" so that the cyrus magic file takes precedence and skiplist files are identified correctly.