Going Go1.17.3 -> Go1.17.6 brings in fixes to compiler, runtime and stdlib
including security fixes to syscall and net/http packages.

https://go.dev/doc/devel/release#go1.17.minor

Tested via:

- SlapOS.SoftwareReleases.IntegrationTest.Python2 (https://nexedijs.erp5.net/#/test_result_module/20220118-7422B39B), and
- SlapOS.SoftwareReleases.IntegrationTest.Python3 (https://nexedijs.erp5.net/#/test_result_module/20220118-30B9FCE8)

/cc @luke, @jerome, @alain.takoudjou, @xavier_thompson @tomo, @lu.xu
/reviewed-on nexedi/slapos!1116