pgsql: Switch position of some declarations in libpq.h

Switch position of some declarations in libpq.h This makes the header more consistent with the surroundings, with declarations associated to a given file grouped together. Author: Daniel Gustafsson Discussion: https://postgr.es/m/20190608012439.gb7...@paquier.xyz Branch -- master Details --

pgsql: Fix some typos

Fix some typos Author: Guillaume Lelarge Discussion: https://postgr.es/m/caectzewpz4jikzuqzdmjqpte8dap3nzxpd-58y-hhvirg0f...@mail.gmail.com Branch -- master Details --- https://git.postgresql.org/pg/commitdiff/b880e22de4b2543f1c1db758bca4b2135525e87a Modified Files -- doc/s

pgsql: Stop using spelling "nonexistant".

Stop using spelling "nonexistant". The documentation used "nonexistent" exclusively, and the source tree used it three times as often as "nonexistant". Branch -- master Details --- https://git.postgresql.org/pg/commitdiff/f2c71cb71fe186dcf8ebec967f98d1c7c4777943 Modified Files -

pgsql: Update documentation about SIGKILL of postmaster.

Update documentation about SIGKILL of postmaster. Removing shared memory and semaphores in response to server start failure often masks the real problem, a live process associated with the data directory; see commit 5a907404b52753c4d6c6a7c21765aeaa42fd6a3b. Since 9.6, it's rarely necessary to kill

pgsql: Update stale comments, and fix comment typos.

Update stale comments, and fix comment typos. Branch -- master Details --- https://git.postgresql.org/pg/commitdiff/31d250e049b4e3d51a635edaa2221c11815e40e7 Modified Files -- src/backend/access/brin/brin_inclusion.c | 2 +- src/backend/access/transam/multixact.c | 2 +- src