Fixed broken link to "the Joy of Perl"
Fixed broken link to "the Joy of Perl"

PeterMartini/perlweb,alcy/perlweb,alcy/perlweb,alcy/perlweb,Abigail/perlweb,Abigail/perlweb,briandfoy/perlweb,ajolma/perlweb,briandfoy/perlweb,Abigail/perlweb,dagolden/perlweb,ajolma/perlweb,dagolden/perlweb,bjakubski/perlweb,briandfoy/perlweb,bjakubski/perlweb,bjakubski/perlweb,PeterMartini/perlweb,PeterMartini/perlweb,ajolma/perlweb,dagolden/perlweb