Lower leaf cert validity to 199 days

[farhan900720-web]

refs #10437

Describe the solution
As discussed in the issue by @Al2Klimov, this PR takes the first step in the phased approach to comply with CA/Browser-Forum guidelines by lowering the leaf certificate validity from 397 days to 199 days.

Changes made:

• Updated LEAF_VALID_FOR to 199 days in lib/base/tlsutility.hpp.
• Updated the corresponding expiration comment in test/base-tlsutility.cpp.
• Added my name to the AUTHORS file as a first-time contributor.

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[bobapple]

@cla-bot check

[Al2Klimov]

Only two things and we can call it a day:

[Al2Klimov]

Fix the missing end of line.

[Al2Klimov]

Keep the file sorted alphabetically.

[farhan900720-web]

doing it in a minute

[farhan900720-web]

i have made the AUTHOR file sorted in alphabetical order and added a new line at the end of file .
please let me know is there any other mistakes done by me or improvement needed as it would be very helpful for me as a newbie .

[farhan900720-web]

@Al2Klimov I have applied the fixes for the alphabetical sorting and the trailing newline. It is ready for the workflows to be approved.

[farhan900720-web]

@Al2Klimov

1. I have amended my commit to update the Git author metadata so it perfectly matches my entry in the AUTHORS file. The mismatch that caused the check to fail earlier should now be fully resolved. Since I am a new contributor, please approve and re-trigger the workflow checks for me when you get a chance .

2. Also if this is too would not work can you tell me what should i do then .

thanks.

[Al2Klimov]

While on it, split your changes into two commits:

1. AUTHORS update
2. Everything else

[Al2Klimov]

Change this line exactly as told by https://github.com/Icinga/icinga2/actions/runs/31117995027/job/92814226117?pr=10976

[Al2Klimov]

Get rid of this diff, whatever it takes.