lib-sieve: Implemented the foreverypart and mime extensions (RFC 5703).

Makefile.am

README

TODO

configure.ac

src/lib-sieve/Makefile.am

src/lib-sieve/plugins/Makefile.am

src/lib-sieve/plugins/mime/Makefile.am

src/lib-sieve/plugins/mime/cmd-break.c

src/lib-sieve/plugins/mime/cmd-foreverypart.c

src/lib-sieve/plugins/mime/ext-foreverypart.c

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

src/lib-sieve/plugins/mime/ext-mime-common.h

src/lib-sieve/plugins/mime/ext-mime.c

src/lib-sieve/plugins/mime/tag-mime.c

src/lib-sieve/sieve-extensions.c

tests/extensions/mime/content-header.svtest

tests/extensions/mime/errors.svtest

tests/extensions/mime/errors/address-mime-tag.sieve

tests/extensions/mime/errors/break.sieve

tests/extensions/mime/errors/exists-mime-tag.sieve