Profile pictures are now handled by the application to mitigate possible directory traversals

to other sub-directories of the static directory (Admins/Staff with the right to edit user
accounts were able to set a path like ../static/favicon.png for the profile picture - this
isn't a "i'm in, now i have root access and can hack your mom"-vulnerability, but better fix
it before it evolves to one. or a dragon. it's too late for this crap.)

static/profilepictures/default.svg

@@ -1,28 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Created with Inkscape (http://www.inkscape.org/) -->
-
-<svg
-   width="16"
-   height="16"
-   viewBox="0 0 16 16"
-   version="1.1"
-   id="svg5"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:svg="http://www.w3.org/2000/svg">
-  <defs
-     id="defs2" />
-  <g
-     id="layer1">
-    <circle
-       style="fill:#808080;fill-opacity:1;stroke:#fffcfe;stroke-opacity:1"
-       id="path848"
-       cx="8"
-       cy="4.5"
-       r="2.5" />
-    <path
-       style="fill:#7f7f7f;fill-opacity:1;stroke:#fffcff;stroke-opacity:1"
-       id="path3433"
-       d="m -3,-13.499699 a 5,5 0 0 1 -2.5,4.3301274 5,5 0 0 1 -5,0 5,5 0 0 1 -2.5,-4.3301274 h 5 z"
-       transform="scale(-1)" />
-  </g>
-</svg>