.pspg_conf file format - FYI for users

Please close this issue, this is only meant as a reference resource and I'm too lazy to make a PR adjusting the docs.

`PSPG_CONF` file syntax

I puzzled over this for a long time, then noticed the excellent menu item Save setup, which helped me understand the syntax for the .conf file.

Know that you are not using the PSPG syntax, here is how my current conf was saved, notice it is a TOML style with parameters not the same as the CLI flags.

ascii_menu = false
bold_labels = false
bold_cursor = false
ignore_case = false
ignore_lower_case = false
no_cursor = false
no_sound = false
no_mouse = false
less_status_bar = false
no_highlight_search = false
no_highlight_lines = false
force_uniborder = false
show_rownum = false
without_commandbar = false
without_topbar = false
vertical_cursor = false
on_sigint_exit = false
no_sigint_search_reset = false
double_header = false
quit_on_f3 = false
pgcli_fix = false
xterm_mouse_mode = true
show_scrollbar = true
menu_always = false
empty_string_is_null = true
last_row_search = true
progressive_load_mode = true
highlight_odd_rec = false
hide_header_line = false
on_exit_reset = false
on_exit_clean = false
on_exit_erase_line = false
on_exit_sgr0 = false
direct_color = false
theme = 16
border_type = 2
default_clipboard_format = 0
clipboard_app = 0
hist_size = 500
esc_delay = -1

I absolutely love this tool, use it every day a lot. I hope this helps someone!

okbob / pspg