pgsql: doc: Fix description of some GUCs in docs and postgresql.conf.sa

doc: Fix description of some GUCs in docs and postgresql.conf.sample

The following parameters have been imprecise, or incorrect, about their
description (PGC_POSTMASTER or PGC_SIGHUP):
- autovacuum_work_mem (docs, as of 9.6~)
- huge_page_size (docs, as of 14~)
- max_logical_replication_workers (docs, as of 10~)
- max_sync_workers_per_subscription (docs, as of 10~)
- min_dynamic_shared_memory (docs, as of 14~)
- recovery_init_sync_method (postgresql.conf.sample, as of 14~)
- remove_temp_files_after_crash (docs, as of 14~)
- restart_after_crash (docs, as of 9.6~)
- ssl_min_protocol_version (docs, as of 12~)
- ssl_max_protocol_version (docs, as of 12~)

This commit adjusts the description of all these parameters to be more
consistent with the practice used for the others.

Revewed-by: Justin Pryzby
Discussion: https://postgr.es/m/YK2ltuLpe+FbRXzA@paquier.xyz
Backpatch-through: 9.6

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/2941138e60fc711bd221b3264807f36cc079dfbb

Modified Files
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doc/src/sgml/config.sgml                      | 38 ++++++++++++++++++++++++---
src/backend/utils/misc/postgresql.conf.sample |  1 +
2 files changed, 35 insertions(+), 4 deletions(-)