Fix a regression that broke reading of covers from HTMLZ and TXTZ files.

Fix sort order of similarly-named hierarchical categories.Linux: Content server: Do not call listen on pre-activated sockets.

FB2 Input: Fix the 'Annotations' section not showing up in the Table of Contents.TXTZ Output: Fix cover not being properly identified in the generated TXTZ metadata.TXTZ Output plugin: Only keep images if the text format is one that can reference images.

E-book viewer: Fix the occasional search result being marked as not found even though it is found.E-book viewer: Fix a regression that could cause the viewer to enter an infinite loop when displaying the result of a search that has only one match that is not found.Annotations browser: Fix exporting highlights in markdown not including all chapter titles for books with only a single highlight per chapter or a multi level ToC.E-book viewer: Image popup: Add a checkbox to remember the last used zoom level.E-book viewer: Add a command line flag -new-instance to force the viewer to open a new window even if the option to always use a single viewer window is set.Calibre’s robust conversion options support Add tags and comments for better searchability. Calibre keeps things orderly by creating single entries for books that contains multiple formats. Let Calibre be your multi-tasking digital librarian. Organize your collection, convert your books to multiple formats, and sync with all of your devices. Calibre is a complete e-book library manager.

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