maxHeaderSize default of 8192 is too big, because it doesn't include the header field name

[jpmschuler]

Bug Report

Current Behavior
If you have too many cache tags, the tags are truncated after 8192 characters, however the line in the generated .htaccess-file is then

				Header set X-SFC-Tags "<truncated cache tags>"

which adds 28 characters and results in 8220 characters.
If that URL is accessed in the frontend an core:alert with Error reading /path/to/tx_staticfilecache/domain_443/path/to/page/.htaccess at line 14: Line too long is resulting in a HTTP error 500.

Online I found mentions that there is a max line length of 8190 characters for .htaccess files. I couldn't find a docs link for that, but this number repeats in many header relevant stuff.

Reducing that .htaccess line by a few chars resolves the error

Expected behavior/output

Environment

• TYPO3 version(s): 12
• staticfilecache version: 13.1.3

Possible Solution
adapt maxHeaderSize defaults and the hardcoded fallback value at

staticfilecache/Classes/Generator/HtaccessGenerator.php

Line 53 in eb59ab4

$maxHeaderSize = (int) ($configurationService->get('maxHeaderSize') ?? 8192);

from 8192 to e.g. 8100 to take into account the header attribute name as well and not only the payload.

[jpmschuler]

context: e05977e and #432

[jpmschuler]

fixed via #432, was just outdated extension version, sry