net: squid: bump version to 4.4

net: squid: bump version to 4.4

Simple bump from 4.3 to 4.4

Changelog since 4.3:
netdb not saving to disk (#311)
Fix memory leak when parsing SNMP packet (#313)
Fix several windows build issues (#309)
Certificate fields injection via %D in ERR_SECURE_CONNECT_FAIL (#306)
Allow compilation with minimal OpenSSL (#281)
Fixed %USER_CA_CERT_xx and %USER_CERT_xx crashes (#301)
Improve const correctness for hash_link (#300)
Bug #4893: Malformed %>ru URIs for CONNECT requests (#299)

Signed-off-by: Marko Ratkaj <marko.ratkaj@sartura.hr>