[adamdickmeiss]

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[Copilot]

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What changed in this PR

This PR simplifies nullable database-name copying and cleans up formatting across the yazpp toolkit’s Z39.50 server, client association, and sample code.

Changes:

• Replaces conditional odr_strdup usage with odr_strdup_null in database-record creation.
• Standardizes function spacing, indentation, and line wrapping.
• Removes trailing whitespace from copyright comments.

File	Description
src/​yaz-z-server.cpp	Simplifies nullable database-name copying and normalizes formatting.
src/​yaz-z-server-update.cpp	Adjusts update-service call formatting and indentation.
src/​yaz-z-server-sr.cpp	Reformats retrieval signatures and function calls.
src/​yaz-z-server-ill.cpp	Normalizes logging-call spacing and comment whitespace.
src/​yaz-z-query.cpp	Removes trailing whitespace from the copyright comment only.
src/​yaz-z-databases.cpp	Normalizes database-helper signatures and call spacing.
src/​yaz-my-server.cpp	Reformats sample-server declarations, definitions, and calls.
src/​yaz-marc-sample.cpp	Removes trailing whitespace from the copyright comment only.
src/​yaz-ir-assoc.cpp	Standardizes association-method formatting and indentation.

_{Review effort: Balanced}