Removed lwip

[CarlWachter]

Removed lwip and replaced all references with interfaces to hermit networking.

Should be merged with hermit-os/hermit-playground#27 to avoid breaking hermit-os/hermit-gcc, as it only pulls the latest commit from newlib.

[mkroening]

Thanks! Where do inet_*.c and friends come from?

[CarlWachter]

Thanks! Where do inet_*.c and friends come from?

It's from the debian source code. Ex.:
https://sources.debian.org/data/main/g/glibc/2.28-10/inet/inet_ntoa.c

[mkroening]

Thanks! Where do inet_*.c and friends come from?

It's from the debian source code. Ex.: https://sources.debian.org/data/main/g/glibc/2.28-10/inet/inet_ntoa.c

Do we actually need any new files besides inet_ntoa.c? Makefile.in does not have other new files.

Instead of taking them from glibc, can we just use newlib/libc/sys/linux/net/inet_ntoa.c?

If we really need to add new files from glibc, please add a SPDX License ID and add a link to the source. For example:

/* SPDX-License-Identifier: LGPL-2.1-or-later */
/* From https://sourceware.org/git/?p=glibc.git;a=blob;f=inet/inet_ntoa.c;h=341d8591c30b88d4415898d93ae0dcbd7bf4e3d6;hb=46b5e98ef6f1b9f4b53851f152ecb8209064b26c */

[CarlWachter]

Do we actually need any new files besides inet_ntoa.c? Makefile.in does not have other new files.

True, i removed the others. If they are needed in the future, they are easy to add back in.

Instead of taking them from glibc, can we just use newlib/libc/sys/linux/net/inet_ntoa.c?

I tried that and it led to a lot of issues, since one linux file typically seeks to have 20 other linux files included with it.

If we really need to add new files from glibc, please add a SPDX License ID and add a link to the source. For example:

/* SPDX-License-Identifier: LGPL-2.1-or-later */
/* From https://sourceware.org/git/?p=glibc.git;a=blob;f=inet/inet_ntoa.c;h=341d8591c30b88d4415898d93ae0dcbd7bf4e3d6;hb=46b5e98ef6f1b9f4b53851f152ecb8209064b26c */

Done