* Move the reexec parts of lib/srv to session/reexec
* Update references to the moved bits of lib/srv
* Avoid testutils in session/reexec
* Shuffle some constants around to avoid imports in session/reexec
* Vendor in the relevant parts of logutils in session/reexec
* Remove unnecessary symlink checks when opening files
* Inline the last two things from lib/utils in session/reexec
* Inline moved constants
* Deprecate group name consts and fix missed inlines
* Add missing session/reexec.TestMain with reexec check
* Reuse existing constants from the log constants package in session
* Fix broken godoc link
* Depguard rules for the session submodule
* Move lib/auditd to session/auditd
* Move lib/loginuid to session/loginuid
* Reduce dependencies of lib/utils/envutils
* Move lib/utils/envutils to session/envutils
* Split the SSH utilities of sshutils/x11 into sshutils/x11forward
* Move lib/sshutils/x11 to session/networking/x11
* Move lib/sshutils/networking to session/networking
* Move lib/shell to session/shell
* Move lib/utils/uds to session/uds
* Move lib/utils/host to session/host
* Move lib/pam to session/pam
* Avoid lib/utils/log in session/pam
* Move lib/service/servicecfg.PAMConfig to session/pam/pamcfg.PAMConfig
* Move lib/srv/uacc to session/uacc
* Avoid importing lib/utils in session/uacc
* Move lib/selinux to session/selinux
* Avoid lib/utils and lib/utils/log in session/selinux
* make go-mod-tidy-all
* Update oss-fuzz path for session/networking/x11
Edoardo Spadolini