[BUG/FEAT] Form validation

[naja]

Hi,

right now, a lot of problems are caused when people use certain characters in form fields like work title.

this includes things like ampersands and quotes etc... , that are reserved in URL's, but also codes that have meaning in wiki, eg replacing a double quote by two single ones, will cause trouble on the resulting page because that will put things in italic and cause it to be impossible to add files to that page if i remember well...

greets
naja

[imslp]

This bug should also have been fixed after this base bug is fixed: viewtopic.php?t=432