Do not warn about compatible OpenSSL upgrades

[bmwiedemann]

Do not warn about compatible OpenSSL upgrades.

When releasing OpenSSL patch-level maintenance updates,
we do not want to rebuild binaries using it.
And since they guarantee ABI stability, we do not have to.

Without this patch, warning messages were produced
that confused users:
https://bugzilla.opensuse.org/show_bug.cgi?id=1129411

[coveralls]

Pull Request Test Coverage Report for Build 5785

• 0 of 2 (0.0%) changed or added relevant lines in 1 file are covered.
• 934 unchanged lines in 10 files lost coverage.
• Overall coverage decreased (-0.02%) to 60.305%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/lib/crypt_ops/crypto_openssl_mgt.c	0	2	0.0%

Files with Coverage Reduction	New Missed Lines	%
src/feature/hs/hs_service.c	4	73.72%
src/lib/container/buffers.c	6	91.03%
src/app/config/config.c	14	72.15%
src/feature/relay/router.c	31	34.88%
src/feature/dirparse/routerparse.c	34	93.04%
src/feature/nodelist/routerlist.c	46	37.57%
src/lib/net/address.c	55	91.1%
src/core/or/channeltls.c	72	43.37%
src/core/mainloop/connection.c	232	25.39%
src/core/or/circuituse.c	440	29.4%

Totals
Change from base Build 4665:	-0.02%
Covered Lines:	42872
Relevant Lines:	71092

---

💛 - Coveralls

[teor2345]

Thanks for this pull request!

We do our task tracking using our own Trac instance, I've opened a ticket here:
https://trac.torproject.org/projects/tor/ticket/30190#comment:2

I think we've had issues in the past where OpenSSL has promised version compatibility, but failed to deliver. I've assigned the review to one of our developers who should be able to provide more details.

We try to do reviews within a week.