Sieve tools: added support for extended trace debugging and updated man pages.

doc/man/sieve-filter.1

doc/man/sieve-test.1

doc/man/sievec.1

doc/man/sieved.1

src/lib-sieve/plugins/include/ext-include-common.c

src/lib-sieve/sieve-interpreter.c

src/lib-sieve/sieve-runtime-trace.h

src/lib-sieve/sieve-runtime.h

src/lib-sieve/sieve-types.h

src/sieve-tools/sieve-test.c

src/testsuite/cmd-test.c

src/testsuite/testsuite-script.c

src/testsuite/testsuite.c