Besides the version bump, this backports a patch so that cmake uses the
same so version information as the current autotools, allowing the
switch over to cmake.

6.9.5_rev1 Changelog:

- Look-behind bug: if the look-behind contains a branch with a character
  length of 0 and an anchor is included in the branch, the whole
  look-behind is ignored
- POSIX API disabled by default -- enabled in openwrt, as at least
  libevhtp needs it
- Update Unicode version 13.0.0
- NEW: Code point sequence notation \x{HHHH HHHH ...}, \o{OOOO OOOO ...}
- NEW API: retry limit in search functions
- NEW API: maximum nesting level of subexp call
- Fixed behavior of isolated options in Perl and Java syntaxes.
  /...(?i).../

Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>

This version adds a new RegSet API, and fixes the following:
 - CVE-2019-19012
 - CVE-2019-19203
 - CVE-2019-19204
 - CVE-2019-19246
 - some problems (found by libFuzzer test)

Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>

This release incorporates fixes for CVE-2019-13224 and CVE-2019-13225,
and "fixed many problems (found by libfuzzer programs)."

Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>

The patches were taken from upstream commits.

Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>

Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com>

oniguruma is a regular expression library for different character
encodings.

It is a dependency of current version of libevhtp, and is currently only
producing a static library, not generating an installable package.

Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com>