v4.9

Changes to squid-4.9 (05 Nov 2019):

- Bug 4978: eCAP crash after using MyHost().newRequest()
- Bug 4970: excessive gnutls_certificate_credentials debug msgs
- Bug 4969: GCC-9 build failure: stringop-truncation
- Bug 4966: Lower cache_peer hostname
- Bug 4918: Crashes when using OpenSSL prior to v1.0.2
- TLS: Fix parsing of certificate validator responses
- TLS: Fix parsing of TLS messages that span multiple records
- TLS: Fix on_unsupported_protocol tunnel action
- TLS: Fix expiration of self-signed generated certs to be 3 years
- HTTP: Ignore malformed Host header in intercept and reverse proxy mode
- HTTP: RFC 7230: server MUST reject messages with BWS after field-name
- HTTP: Fix URN response handling
- HTTP: Hash Digest noncedata
- Update URI parser to use SBuf parsing APIs
- Prevent truncation for large origin-relative domains
- Fix several rock cache_dir corruption issues
- Debug detail validation errors for loaded-from-file certificate chains
- smblib: Improve SMB server name maintenance
- cachemgr.cgi: Add validation for hostname parameter
- ... and several compile issues
- ... and some documentation updates