General Cleanup, update copyright notices, remove some old stuff

[pulsastrix]

This PR performs some general cleanup, removing obsolete and inaccurate documentation as well as old GitLab-related files.

Also, it replaces the old copyright notices in all file headers, solving some smaller issues with the previous one:

• Maintaining year numbers in copyright notices for each file separately
  is a chore, not very accurate (esp. if code is moved between files),
  and this approach has already been abandoned by larger projects such
  as curl.

  Therefore, we have removed copyright years from all file headers,
  keeping only the year numbers referring to the project as a whole
  in README, NOTICE and LICENSE files.

• The previous header states the copyright owner as "The NAMIB Project
  Contributors", which is problematic in the sense that A) the project
  is no longer active, B) never was a legal entity in the first place
  and C) is no longer accurate given third-party contributions.

  The new header instead refers to "The libcoap-rs Contributors", with
  the NOTICE and README files being a bit more specific and stating the
  author to be "Hugo Hakim Damer, the NAMIB Project Members, and the
  other libcoap-rs Contributors", which provides at least one legal
  entity (me) and a general term encompassing all contributors.

  Additionally, we now provide a NOTICE file containing more detailed
  information on copyright ownership, maintainers, contact information,
  etc.

  The approach of using a general "The XYZ Contributors" term is best
  practice in e.g., Linux Foundation projects, and the NOTICE file takes some
  inspiration from the Eclipse Foundation project guidelines.

• Also, updated the copyright years that remain to consistently be 2021-2025.

[github-actions]

Workflow Status Report

Generated for commit a5a43e6 on Mon Jan 27 18:14:56 UTC 2025.

In case of failure, clippy warnings and rustfmt changes (if any) will be indicated as CI check warnings in the file comparison view.

Documentation: Read Online Download

Coverage Report: Read Online Download

Note: Online versions of documentation and coverage reports may not be available indefinitely, especially after the pull request was merged.

Code Coverage Report

Coverage target is 80%.

Expand to view coverage statistics

file	coverage	covered	missed_lines
libcoap-sys/src/lib.rs	83.27%	209 / 251	370-381, 489-492, 500, 527-544, 669-672, 756-759
libcoap/src/context.rs	61.50%	230 / 374	107, 168-213, 223-230, 247, 276, 323-326, 360, 375-377, 442, 447, 463, 471-633
libcoap/src/crypto/pki_rpk/key.rs	56.67%	51 / 90	179-218, 242-250, 252-255, 261-263
libcoap/src/crypto/pki_rpk/mod.rs	21.90%	99 / 452	36-279, 454-486, 507-605, 613, 616, 650-668, 678-680, 685-687, 692-694, 755, 767-903
libcoap/src/crypto/pki_rpk/pki.rs	78.08%	114 / 146	90-149, 302-315
libcoap/src/crypto/pki_rpk/rpk.rs	72.60%	53 / 73	68-98, 160-171
libcoap/src/crypto/psk/client.rs	45.59%	62 / 136	71-75, 83, 106-192, 234-242, 269-271, 276-278, 306-338
libcoap/src/crypto/psk/key.rs	61.46%	59 / 96	42-49, 163-205
libcoap/src/crypto/psk/mod.rs	0.00%	0 / 45	30-100
libcoap/src/crypto/psk/server.rs	30.54%	51 / 167	69-88, 96, 99, 116-119, 145-147, 152-154, 159-161, 189-234, 255, 271-396
libcoap/src/error.rs	0.00%	0 / 6	90-170
libcoap/src/event.rs	29.73%	11 / 37	36-168
libcoap/src/lib.rs	0.00%	0 / 64	62-165
libcoap/src/mem.rs	72.89%	121 / 166	148-163, 196-198, 210-212, 280, 296-298, 319-324, 353-355, 369, 381-393, 454-456, 473, 481-488, 507, 527, 531
libcoap/src/message/mod.rs	58.46%	190 / 325	105-108, 110-131, 139-145, 147-168, 172, 174, 176, 208, 210, 213-222, 225-243, 245-249, 265-275, 295-302, 398, 441, 447, 478, 488-491, 497-499, 506, 511-523, 529, 549-551, 561-563
libcoap/src/message/request.rs	34.12%	101 / 296	51, 68-202, 228-256, 264-365, 371-375, 380-381, 383-386, 389, 395-401, 430-432, 436, 439-441, 444-446, 449, 452, 455, 458, 461, 472-479
libcoap/src/message/response.rs	22.17%	45 / 203	36-160, 165, 168, 171, 174, 177, 195-325, 329-334, 360
libcoap/src/prng.rs	55.41%	41 / 74	66, 78-116, 139-149, 196
libcoap/src/protocol.rs	35.88%	61 / 170	164-166, 171-176, 178-193, 195-196, 203-208, 210-225, 227-228, 248-287, 308, 322-324, 369-374, 383-388, 444-469, 475-488, 520, 522
libcoap/src/resource.rs	70.49%	172 / 244	61, 93-95, 170-175, 182-207, 213-218, 248, 265-287, 299-302, 327-330, 363-372, 505-507
libcoap/src/session/client.rs	90.20%	138 / 153	164, 191, 223, 231-233, 239-241, 288-294
libcoap/src/session/mod.rs	39.64%	111 / 280	62-74, 105, 115-230, 240-285, 294-297, 306-317, 346, 350, 382-402, 424, 432, 464, 471, 489-495, 570, 576
libcoap/src/session/server.rs	82.05%	64 / 78	75-77, 81, 152, 162-164, 179, 194-200
libcoap/src/transport.rs	70.97%	22 / 31	29-36, 55
libcoap/src/types.rs	55.60%	313 / 563	71-125, 131-160, 210-223, 241-243, 253-265, 272-278, 284-286, 295, 562, 571, 583, 610, 636-705, 758, 803-824, 845-847, 863-868, 879-964
libcoap/tests/common/dtls.rs	94.34%	50 / 53	49, 54-55
libcoap/tests/common/mod.rs	93.68%	89 / 95	85-88, 92, 126
libcoap/tests/dtls_pki_client_server_test.rs	100.00%	82 / 82
libcoap/tests/dtls_psk_client_server_test.rs	100.00%	26 / 26
libcoap/tests/dtls_rpk_client_server_test.rs	100.00%	7 / 7
libcoap/tests/tcp_client_server_test.rs	100.00%	22 / 22
libcoap/tests/udp_client_server_test.rs	100.00%	22 / 22

Total coverage: 54.20%

[JKRhb]

LGTM! :) See just one comment below (and remember squashing 😉)

[JKRhb]

See one last-minute nit below, otherwise: LVGTM! :) 🚀