Remove ‘:’ from the list of valid chars in wiki filenames.

Because it's interpreted weirdly by Image::Magick:

  $ identify 'Screenshot_from_2015-02-23_18:59:48-extract.png[0]'
    identify: no decode delegate for this image format `59\' @ error/constitute.c/ReadImage/501.
  $ mv 'Screenshot_from_2015-02-23_18:59:48-extract.png' screenshot.png
  $ identify 'screenshot.png[0]'
    screenshot.png[0]=>screenshot.png PNG 453x122 453x122+0+0 8-bit sRGB 11.2KB 0.000u 0:00.000

1 files changed, 1 insertions, 1 deletions

diff --git a/roles/wiki/files/var/lib/ikiwiki/fripost-wiki.setup b/roles/wiki/files/var/lib/ikiwiki/fripost-wiki.setup
index fb61c59..cfefb77 100644
--- a/roles/wiki/files/var/lib/ikiwiki/fripost-wiki.setup
+++ b/roles/wiki/files/var/lib/ikiwiki/fripost-wiki.setup
@@ -90,41 +90,41 @@ timeformat: '%c'
 userdir: ''
 # how many backlinks to show before hiding excess (0 to show all)
 numbacklinks: 10
 # attempt to hardlink source files? (optimisation for large files)
 hardlink: 0
 # force ikiwiki to use a particular umask (keywords public, group or private, or a number)
 #umask: public
 # group for wrappers to run in
 wrappergroup: ikiwiki
 # extra library and plugin directory
 libdir: /var/lib/ikiwiki
 # environment variables
 ENV: {}
 # time zone name
 #timezone: US/Eastern
 # regexp of normally excluded files to include
 #include: ^\.htaccess$
 # regexp of files that should be skipped
 #exclude: ^(*\.private|Makefile)$
 # specifies the characters that are allowed in source filenames
-wiki_file_chars: -[:alnum:]+/.:_
+wiki_file_chars: -[:alnum:]+/._
 # allow symlinks in the path leading to the srcdir (potentially insecure)
 allow_symlinks_before_srcdir: 0
 # cookie control
 cookiejar:
   file: /var/lib/ikiwiki/.ikiwiki/cookies
 # set custom user agent string for outbound HTTP requests e.g. when fetching aggregated RSS feeds
 useragent: ikiwiki/3.20141016.2
 
 ######################################################################
 # core plugins
 #   (editpage, git, htmlscrubber, inline, link, meta, parentlinks,
 #    templatebody)
 ######################################################################
 
 # git plugin
 # git hook to generate
 git_wrapper: /var/lib/ikiwiki/wiki.fripost.org
 # shell command for git_wrapper to run, in the background
 #git_wrapper_background_command: git push github
 # mode for git_wrapper (can safely be made suid)