Make CFLAGS overridable.

If $CFLAGS is not last in the assignment, then you cannot override
flags like -O2.
Revert "Fix a segmentation fault if the private key file is corrupted"

This reverts commit 0f274922003536f46be300997ea0be426ee094bf.
Accidentially reappeared. Mea culpa.
Fix possible uninitialised buffer use.
Don't break connection when access is denied.
Agent shouldn't stat parent directories on recursive copies.
Merge pull request #1363 from jimis/multi-tenancy

cf-serverd access control
Log promise type pass indices
Removed invalid comment.
All cf-serverd logging is prefixed with client IP address.
Redmine#4077: define special ignored package name and use it
Change separator to IPv6 friendly symbol.
Updated ChangeLog.
Merge pull request #1364 from jimis/multi-tenancy

cf-serverd logging prefix.
Don't link dl on FreeBSD
Reports promises are never repaired
Bufferize PrintToFile
Output from reports promises should not go through Log system
PrintFile should not go through Log system
Do not call syslog from Windows build
Small fix.