docs: Add hint that "socket address" usually don't need to be set.

docs: Add hint that "socket address" usually don't need to be set.

This fixes bug #5950.
Thanks to the Debian Samba package maintainers for reporting!

Karolin
(cherry picked from commit 19beef0dd9354296ae79d32077c58fbacf570c85)
(cherry picked from commit 0d035d36bd3707ccb9f77f0b2730869dc78719d4)
(cherry picked from commit 6be19f94802d545cc43286aa242b0ca2e5b79721)
(cherry picked from commit 879a4fbe99739b67d877caac2d7a2f763c69d41f)
(cherry picked from commit 51a9b237d401151eed43ab917d2dd10d8693a764)