- simplify `.TH` headers.
- delete empty lines before sections.
- update template with an `AVAILABILITY` section.
Left libssh2 version number in the `.TH` header for entries without an
`AVAILABILITY` section, or where there was a different version number
there.
Before this patch, libssh2 sent hardcoded `LIBSSH2_SFTP_ATTRIBUTES`
struct on handle open. This can be problematic on some special OS,
where the file size should be known on new file creation. I added
two new functions to resolve this issue.
Patch-by: @vajdaakos on github via #506
Changes compared to #506:
- drop attr size fixup in favour of #946.
- move `memcpy()` under the state where we need it.
- bump filename length type to `size_t`.
- fix filenames in documentation and other nits.
Closes#506Closes#947
