[PATCH v2] doc: update http.cookieFile with in-memory cookie processing

From: Piotr Szlazak <piotr.szlazak@gmail.com>

Information added how to enable in-memory cookies processing. Cookies from server will be accepted and send back in successive requests within same connection.

At the moment documentation only mentions how to read cookies from the given file and how to save them to the file using http.saveCookies.

curl / libcurl will process cookies in memory if file name is blank. Check curl manpage: https://curl.se/docs/manpage.html#-b This is described here in more details: https://everything.curl.dev/http/cookies/engine.html And also explained here: https://www.youtube.com/watch?v=V5vZWHP-RqU&t=11459s

Git documentation was updated to include suggestion how to enable this by setting empty value for http.cookieFile.

Changes since V1:
- better explanation what in-memory processing means
- added explanation that http.saveCookies does not work
  if http.cookieFile was set to empty value

Signed-off-by: Piotr Szlazak <piotr.szlazak@gmail.com>
---
    Update http.cookieFile with in-memory cookie processing

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-1733%2Fpszlazak%2Fdocumentation-cookieFile-in-memory-v2
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-1733/pszlazak/documentation-cookieFile-in-memory-v2
Pull-Request: https://github.com/git/git/pull/1733

Range-diff vs v1:

 1:  5e9b3924224 ! 1:  c4d41b5884d doc: update http.cookieFile with in-memory cookie processing
     @@ Commit message
          Git documentation was updated to include suggestion how to
          enable this by setting empty value for http.cookieFile.
      
     +    Changes since V1:
     +    - better explanation what in-memory processing means
     +    - added explanation that http.saveCookies does not work
     +      if http.cookieFile was set to empty value
     +
          Signed-off-by: Piotr Szlazak <piotr.szlazak@gmail.com>
      
       ## Documentation/config/http.txt ##
     @@ Documentation/config/http.txt: http.extraHeader::
      -	in the Git http session, if they match the server. The file format
      -	of the file to read cookies from should be plain HTTP headers or
      -	the Netscape/Mozilla cookie file format (see `curl(1)`).
     +-	NOTE that the file specified with http.cookieFile is used only as
     +-	input unless http.saveCookies is set.
      +	which should be used in the Git http session, if they match the server.
      +	The file format of the file to read cookies from should be plain HTTP
      +	headers or the Netscape/Mozilla cookie file format (see `curl(1)`).
     -+	Set it to empty value, to enable in-memory cookies processing.
     - 	NOTE that the file specified with http.cookieFile is used only as
     - 	input unless http.saveCookies is set.
     ++	Set it to empty value (''), to accept only new cookies from the server and
     ++	send them back in successive requests within same connection. NOTE that the
     ++	file specified with http.cookieFile is used only as input unless
     ++	http.saveCookies is set.
     + 
     + http.saveCookies::
     + 	If set, store cookies received during requests to the file specified by
     +-	http.cookieFile. Has no effect if http.cookieFile is unset.
     ++	http.cookieFile. Has no effect if http.cookieFile is not set or set to empty
     ++	value ('').
       
     + http.version::
     + 	Use the specified HTTP protocol version when communicating with a server.

 Documentation/config/http.txt | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)