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Target Dist: SLES 11, RHELS6, both for stateless
Aim: To Support "group" format of .pkglist file
e.g.: "@ X Window system" (for RHELS6)
"@ file_server" (for SLES11)
user impact: N/A
By-effect: N/A
Limitations: N/A
Note: Note there's a space after "@"
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git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@10023 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
