Log Message:
Update sylpheed to 1.0.3.
Also refresh mime.types file from current apache 2 version.

Changes to sylpheed:

v1.0.3:
    * A buffer overflow which occurred when replying to a message with
      certain headers which contain non-ascii characters was fixed.
    * A memory leak of the composition window was fixed.

v1.0.2:
    * The incompatibility of PGP signature between gnupg-1.2 and 1.4
      which occurred when trailing spaces appeared was fixed.
    * The generation of References header was modified so that it is
      generated even if a replied message doesn't have Message-Id.
    * The documents were update