Add missing status codes (#1096)

Author: r-m-n

starlette/status.py

@@ -1,14 +1,14 @@
 """
 HTTP codes
-See RFC 2616 - https://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
-And RFC 6585 - https://tools.ietf.org/html/rfc6585
-And RFC 4918 - https://tools.ietf.org/html/rfc4918
-And RFC 8470 - https://tools.ietf.org/html/rfc8470
+See HTTP Status Code Registry:
+https://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml
+
 And RFC 2324 - https://tools.ietf.org/html/rfc2324
-And RFC 5842 - https://tools.ietf.org/html/rfc5842
 """
 HTTP_100_CONTINUE = 100
 HTTP_101_SWITCHING_PROTOCOLS = 101
+HTTP_102_PROCESSING = 102
+HTTP_103_EARLY_HINTS = 103
 HTTP_200_OK = 200
 HTTP_201_CREATED = 201
 HTTP_202_ACCEPTED = 202
@@ -18,6 +18,7 @@
 HTTP_206_PARTIAL_CONTENT = 206
 HTTP_207_MULTI_STATUS = 207
 HTTP_208_ALREADY_REPORTED = 208
+HTTP_226_IM_USED = 226
 HTTP_300_MULTIPLE_CHOICES = 300
 HTTP_301_MOVED_PERMANENTLY = 301
 HTTP_302_FOUND = 302
@@ -26,6 +27,7 @@
 HTTP_305_USE_PROXY = 305
 HTTP_306_RESERVED = 306
 HTTP_307_TEMPORARY_REDIRECT = 307
+HTTP_308_PERMANENT_REDIRECT = 308
 HTTP_400_BAD_REQUEST = 400
 HTTP_401_UNAUTHORIZED = 401
 HTTP_402_PAYMENT_REQUIRED = 402
@@ -45,10 +47,12 @@
 HTTP_416_REQUESTED_RANGE_NOT_SATISFIABLE = 416
 HTTP_417_EXPECTATION_FAILED = 417
 HTTP_418_IM_A_TEAPOT = 418
+HTTP_421_MISDIRECTED_REQUEST = 421
 HTTP_422_UNPROCESSABLE_ENTITY = 422
 HTTP_423_LOCKED = 423
 HTTP_424_FAILED_DEPENDENCY = 424
 HTTP_425_TOO_EARLY = 425
+HTTP_426_UPGRADE_REQUIRED = 426
 HTTP_428_PRECONDITION_REQUIRED = 428
 HTTP_429_TOO_MANY_REQUESTS = 429
 HTTP_431_REQUEST_HEADER_FIELDS_TOO_LARGE = 431
@@ -59,7 +63,10 @@
 HTTP_503_SERVICE_UNAVAILABLE = 503
 HTTP_504_GATEWAY_TIMEOUT = 504
 HTTP_505_HTTP_VERSION_NOT_SUPPORTED = 505
+HTTP_506_VARIANT_ALSO_NEGOTIATES = 506
 HTTP_507_INSUFFICIENT_STORAGE = 507
+HTTP_508_LOOP_DETECTED = 508
+HTTP_510_NOT_EXTENDED = 510
 HTTP_511_NETWORK_AUTHENTICATION_REQUIRED = 511