Switch Clang analyzer from 10 to the Debian Sid default
Switch Clang analyzer from 10 to the Debian Sid default

Clang 10 is no longer available in Debian and 11 is now the default
for Sid, so the reason for locking the version does not apply any more
(see bf8cfb50cbf2b0a11201eb293180c05aaa570fed). :-)

airtower-luna/mod_gnutls,airtower-luna/mod_gnutls,airtower-luna/mod_gnutls