util.argparse: Add support for repeatable parameters These are gathered into arrays

mod_storage_sql: Fix column name in index check for PostgreSQL Forgot to change the column name in 9a7523ea45cb

mod_storage_sql: Adjust indentation to align with surrounding code

mod_storage_sql: Only remove old index if it exists Avoids an error if the upgrade is performed twice..

mod_storage_sql: Be more specific when checking for old index in SQLite3 Prevents false positives in the odd case where something other than an index with this name might exist.

mod_storage_sql: Improve check for old table index on PostgreSQL The "pg_indexes" view is much simpler to inspect than "pg_class"

mod_storage_sql: Enable UPSERT with PostgreSQL Tested. Works.

doap: Fix typo in attribute name

util.pposix: Use Lua enum API for resource limit name argument Because diffstat.

mod_storage_sql: Add some TODO comments for future UPSERT work