apache-frontend: Update TODO to current state

software/apache-frontend/TODO.txt

 Apache:
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-- Return parameters "site-url" for backward compatibility (important)
-- Use gzip by default (important)
 - set a redirection of / in option
 - Implement support of multiple ip (if possible) for multiple ssl (other solution is to ask master instance but quid to much apache process?)
-- SSL engine on port 80? (important)
-- Log use info instead of warning to log access ?
-- Check ipv6 for master instance and provide it to slave instances
 
 Squid:
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@@ -14,8 +9,5 @@ Squid:
 
 SlapOS:
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-- Move slave configuration directory to etc (generated by slapgrid)
-- Order and split templates into sub-directories. eg: One subdirectory per software type and one common directory.
-- Rename templates to be more explicit
 - Implement intelligent apache graceful -> Should check slave configuration and return error to slave if there is a problem (important but difficult)
 - useless srv/squid_cache directory so far