Z:gnu-man-db-manpages--75c641-Search only the given manual s/en

Search only the given manual sections. I is a colon- or comma-separated list of sections. If an entry in I is a simple section, for example "3", then the displayed list of descriptions will include pages in sections "3", "3perl", "3x", and so on; while if an entry in I has an extension, for example "3perl", then the list will only include pages in that exact part of the manual section.