Just some incidental stuff I noticed while working through the latest updates.

A couple of things here are due to confusion surrounding the top-level configury which is shared between binutils, gcc, gdb, etc.

binutils:
- CPPFLAGS hack no longer needed
- `--enable-lto' is only applicable to the GCC build (per note above re top-level). It does nothing for binutils and should be dropped. In the GCC build it defaults to "on" anyway.
- Netware support was removed in 2018 [1]

gcc:
- CPPFLAGS hack no longer needed
- `--enable-pgo-build=lto' is only applicable to binutils. There is no reference to it in the 11.2 tarball. In fact, if you try to use it on GCC trunk it errors out.

glibc:
- spello
- tweak the comment about systemd-nspawn and syscalls in the testsuite. "--capability=CAP_IPC_LOCK" is too overly broad. Not sure what I was thinking back then, or things might have changed since.
- fix optdepends
- remove /etc/ld.so.conf hack. It was only there to get rid of a warning which has now been fixed upstream [2]
- remove commands rm'ing libcrypt which of course is now disabled in glibc build

linux-api-headers:
- `make headers_check' is deprecated with big fat warning and is going away soon

[1] https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=b4b594e3
[2] https://sourceware.org/git/?p=glibc.git;a=commit;h=b5a1271c