This commit marks (hopefully) ever one-parameter constructor as explicit.
It also uses override in (hopefully) all circumstances where a virtual
method is overridden.
There are a very few other minor changes - most of them were necessary
to get everything to compile (like one additional constructor). In one
case I changed an implicit operation to an explicit string conversion -
I think the automatically chosen conversion was much more convoluted.
This took longer than I want to admit but not as long as I feared :)
BIT-1574 #merged
* origin/topic/johanna/imap-starttls:
IMAP: add c++11 header file that gcc complains about.
IMAP: documentation and test updates
also generate an event when starttls is encounterd for imap.
Add support of getting server capabilities to IMAP parser.
Basic IMAP StartTLS analyzer.
