Also remove the trivial obsolete messages like man page dates.
This is a noisy commit, but this helps keeping the PO files similar
between the Git repository and stable release tarballs.
Names of environment variables and some other strings must be present
in the original form. The translator couldn't be reached so I'm
changing some of the strings myself. In the "Robot mode" section,
occurrences in the middle of sentences weren't changed to reduce
the chance of grammar breakage, but I kept the translated strings in
parenthesis in the headings. It's not ideal, but now people shouldn't
need to look at the English man page to find the English strings.
The .po files from the Translation Project come with unwrapped
strings so this matches it.
This may reduce the noise in diffs too. When the beginning of
a paragraph had changed, the rest of the lines got rewrapped
in msgsid. Now it's just one very long line that changes when
a paragraph has been edited.
The --add-location=file option was removed as redundant. The line
numbers don't exist in the .pot file due to --porefs file and thus
they cannot get copied to the .po files either.
Since the source strings have changed, these would get marked as
fuzzy and the original string would be used instead. The original
and translated strings are identical in this case so it wouldn't
matter. But patching the translations helps still because then
po4a will show the correct translation percentage.
The po4a directory is in EXTRA_DIST and thus all files there
are included in the package. .gitignore doesn't belong in the
package so keep that file out of the po4a directory.
These are temporary files that are needed only when running po4a.
The top-level Makefile.am puts the whole po4a directory into
distribution tarball (it's simpler) so deleting these temporary
files is needed to prevent them from getting into tarballs.
The French and Brazilian Portuguese man page translations have not been
updated since the switch from public domain to 0BSD. The old GPLv2
strings have now been removed from these files.
