Multiple incompatibilities for the type of self

[elazarg]

During my work (mypy/#2381) on a fix for mypy/#2374, I have encountered many bad signatures - mostly missing the self parameter - in the following methods (only a selection of them was chekced manually by me)

Python3

1. stdlib/3/multiprocessing/managers.pyi:8: multiprocessing.managers.BaseManager.register
2. stdlib/3/ssl.pyi:222: ssl.SSLContext.set_alpn_protocols
3. stdlib/3/ssl.pyi:223: ssl.SSLContext.set_npn_protocols
4. stdlib/3/ssl.pyi:234: ssl.SSLContext.wrap_bio
5. stdlib/3/unittest.pyi:141: unittest.TestCase.addCleanup
6. stdlib/3/urllib/request.pyi:120: urllib.request.HTTPPasswordMgrWithPriorAuth.update_authenticated
7. stdlib/3/urllib/request.pyi:122: urllib.request.HTTPPasswordMgrWithPriorAuth.is_authenticated
8. stdlib/3/urllib/request.pyi:194: urllib.request.URLopener.retrieve
9. stdlib/3/urllib/request.pyi:77: urllib.request.BaseHandler.http_error_nnn
10. stdlib/3/urllib/robotparser.pyi:9: urllib.robotparser.RobotFileParser.__init__

Python2:

1. stdlib/2/imp.pyi:35: imp.NullImporter.find_module
2. stdlib/2/select.pyi:97: select.epoll.unregister
3. stdlib/2/select.pyi:98: select.epoll.poll
4. stdlib/2/shlex.pyi:13: shlex.shlex.error_leader
5. stdlib/2/ssl.pyi:172: ssl.SSLContext.set_alpn_protocols
6. stdlib/2/ssl.pyi:173: ssl.SSLContext.set_npn_protocols
7. stdlib/2/_struct.pyi:12: _struct.Struct.pack_into
8. stdlib/2/_symtable.pyi:39: _symtable.symtable.__init__
9. stdlib/2/tempfile.pyi:31: tempfile._RandomNameSequence.normcase
10. stdlib/2/tempfile.pyi:45: tempfile._TemporaryFileWrapper.unlink
11. The third overload of file.__init__:

    def __init__(file: int, mode: str = 'r', buffering: int = ...) -> None: ...

Also, tons of __builtin__ mismatches (possibly spurious).

Third party:

1. third_party/3/pkg_resources.pyi:228: IMetadataProvider.*
2. third_party/2/pymssql.pyi:21: pymssql.Cursor.callproc

[gvanrossum]

Eew! So good to catch these. Can you submit fixes? One PR per subdirectory would be fone.