profiles: replace x11 socket blacklist with disable-X11.inc

[kmk3]

Replace all occurrences of blacklist /tmp/.X11-unix with include disable-X11.inc, which blacklists more X11-related files.

Commands used to search and replace:

$ git grep -Ilz '^blacklist /tmp/.X11-unix' -- \
  etc/profile*/*.profile | xargs -0 perl -0 -pi -e '\
    s/\nblacklist \/tmp\/.X11-unix\n/\n/; \
    s/(\ninclude disable-xdg.inc\n)/\ninclude disable-X11.inc$1/; \
    s/(\ninclude disable-[^Xx\n]+\n)(\n|# )/$1include disable-X11.inc\n$2/'

Note: The following files were also edited manually:

• etc/profile-a-l/erd.profile
• etc/profile-a-l/links-common.profile
• etc/profile-m-z/termshark.profile
• etc/profile-m-z/tmux.profile
• etc/profile-m-z/tshark.profile

Relates to #4462 #4854 #5544.

[kmk3]

Note: I did not manage to call include disable-X11.inc from the code itself without errors, so I left just the main profile search/replace for this PR.