don't use file names as keys

[thomaskrause]

In the xabsl context the names of the loaded xabsl files are used as keys. It may (will) lead to problems when there are two files in different sub folders but with the same names, i.e., when an option and a symbols file have the same name.

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Imported from Launchpad using lp2gh.

• date created: 2011-06-25T15:48:53Z
• owner: mellmann
• the launchpad url was https://bugs.launchpad.net/bugs/801958