Progress converting to new error system

...ext/transport/chttp2/server/secure/server_secure_chttp2.c

src/core/lib/http/httpcli.c

src/core/lib/http/httpcli.h

src/core/lib/http/parser.c

src/core/lib/http/parser.h

src/core/lib/iomgr/resolve_address.h

src/core/lib/iomgr/resolve_address_posix.c

src/core/lib/iomgr/unix_sockets_posix.h