fix prev link generation and move some code to nav

include the day span in the index pages

start counting pages at one

refactor the parsing into the module change the mscan format string to siplify the parsing, and refactor the parsing code into the module for reuse. pe is an exception in that it doesn't care about the format string, it just need to decide if the current line starts a new thread or not, that's why it doesn't use the newly introduced `parse'. The new format simplifies pe too though.

unlink temp listings when done in fixfiles

fattr is not needed anymore

render only the threads list in the indexes, not the full threads suggested by Stefan, thanks!

fix typo; should use $i instead of $page now

print a pagination before *and* after the listing suggested by Stefan. to do this, rework the way index pages are done. Instead of generating the first half and then appending the navigation and the footer, generate only the body and change how fixfiles works to prepend the heading. this dance with temporary index files is needed because we don't know how many pages there are until we've consumed all the input.

move the page number as subtitle

mkindex: adjust pledge for cross-filesystem move()

use move from File::Copy instead of rename i was reminded that rename doesn't work across filesystems. `move' from File::Copy attempts to use rename and falls back to a copy+unlink, which is the thing we need.

pledge and unveil the scripts

drop needless mkdirs

move the mid -> path code to a sub in the package