We should perhaps rename this parameter away from sigsegv_handler?
Maybe error_sighandler? Maybe move it into a feature bit for the
disabling instead of a separate parameter too.

This allows for a panic dump and backtrace to be produced on
sigabrt. This is useful e.g. when using jemalloc's debug flags, which
can through a special environment variable enable memory allocation
consistency checks and trigger sigabrt on errors.

Reported and diff submitted by Gauthier Delacroix on varnish-dev.

Makes this work with multiple instances under systemd.
Discussed with ingvar on irc.

Fixes startup if vcl_dir was specified in DAEMON_OPTS.
Reported by Gauthier Delacroix. Discussed with ssm on irc.

Fixes #1765

understand them.

Fixes: #1770

For continuous updates we can always use a shell loop.

Fixes #1760.

Please note that using underscore in HTTP headers is considered a
really bad idea because many application frameworks map minus to
underscore in environment variables.

Fixes: 	#1768

Discussed with Martin.

Add commas to panic line endinges consistently

This dumps some useful bits about the state of the client connection.

If s_indent > 0 and the buffer is empty, it would check s_buf[-1] for
the '\n' character.

Now it will indent either on previous character being a newline, or on
empty buffer. This allows indenting also the very first line of a
buffer.

Based largely on patch from:	Martin

I wonder if we should make the panic output (readable) JSON format ?

Submitted by:	fgs

"2eq" instead of "Req" didn't look right.

Add missing ones, make the order consistent and remove deprecated
options. More to come.

This does say something about how much is used though.