Added support for reading an entire stringlist into memory. Also fixed various identical bugs in stringlist-related error handling.

Added proper ATTR_FORMAT to all functions that accept a string format and fixed one bug in the process.

Implemented implicit keep to execute when not canceled or when the preceeding action execution fails.

Forgot to initialize sieve library in lda-sieve plugin. It has now successfully delivered its first message.

Properly implemented the code dumper. Dumps are now printed in a stream. The individual opcode and operand implementations no longer use printf()s.

Exported sieve-code-dumper from sieve-interpreter containing all code dumping related implementation. Now to remove all printfs....

Fixed bug in handling optional operands to opcodes that have no mandatory operands (0 is no longer a valid opcode)

The :flags tag introduced by the imapflags extension now attaches side-effects to the appropriate action commands.