PPPoE fixes and improvements #569

Job	Run time
Buildroot (qemu_x86_defconfig, glibc)	1m 26s
Buildroot (qemu_x86_defconfig, uclibc)	1m 26s
Buildroot (qemu_x86_defconfig, musl)	1m 20s
Buildroot (qemu_x86_64_defconfig, glibc)	1m 31s
Buildroot (qemu_x86_64_defconfig, uclibc)	1m 19s
Buildroot (qemu_x86_64_defconfig, musl)	1m 23s
Buildroot (raspberrypi4_defconfig, glibc)	1m 34s
Buildroot (raspberrypi4_defconfig, uclibc)	1m 26s
Buildroot (raspberrypi4_defconfig, musl)	1m 28s
Buildroot (raspberrypi4_64_defconfig, glibc)	1m 59s
Buildroot (raspberrypi4_64_defconfig, uclibc)	1m 26s
Buildroot (raspberrypi4_64_defconfig, musl)	1m 49s
Buildroot (qemu_ppc64le_pseries_defconfig, glibc)	1m 26s
Buildroot (qemu_ppc64le_pseries_defconfig, uclibc)	1m 29s
Buildroot (qemu_ppc64le_pseries_defconfig, musl)	1m 26s
Buildroot (qemu_mips32r2_malta_defconfig, glibc)	1m 24s
Buildroot (qemu_mips32r2_malta_defconfig, uclibc)	1m 22s
Buildroot (qemu_mips32r2_malta_defconfig, musl)	1m 38s
Buildroot (qemu_mips64_malta_defconfig, glibc)	1m 26s
Buildroot (qemu_mips64_malta_defconfig, uclibc)	1m 44s
Buildroot (qemu_mips64_malta_defconfig, musl)	1m 46s
Buildroot (qemu_riscv32_virt_defconfig, glibc)	1m 50s
Buildroot (qemu_riscv32_virt_defconfig, uclibc)	1m 23s
Buildroot (qemu_riscv32_virt_defconfig, musl)	1m 48s
Buildroot (qemu_riscv64_virt_defconfig, glibc)	1m 26s
Buildroot (qemu_riscv64_virt_defconfig, uclibc)	1m 20s
Buildroot (qemu_riscv64_virt_defconfig, musl)	1m 21s
	40m 56s

Provide feedback