Wrap check for URI::Escape in BEGIN block
Wrap check for URI::Escape in BEGIN block

The "unless try" was a good solution, however the check for URI::Escape
needs to happen at compile time, since the later "use" will be checked and
thus fail since URI::Escape isn't there.  What a better solution is, I don't
know, however the test works again now.

dnmfarrell/doc,dnmfarrell/doc,gfldex/doc,jonathanstowe/doc,cygx/doc,perl6/doc,hoelzro/perl6-doc,stmuk/doc,muraiki/doc,jkeenan/doc,stmuk/doc,cygx/doc,antquinonez/doc,dha/doc,tbrowder/doc,MadcapJake/doc,dha/doc,jkeenan/doc,dmaestro/doc,MadcapJake/doc,cygx/doc,hoelzro/perl6-doc,muraiki/doc,gfldex/doc,LLFourn/doc,stmuk/doc,perl6/doc,dnmfarrell/doc,perl6/doc,LLFourn/doc,MasterDuke17/doc,dmaestro/doc,MadcapJake/doc,jonathanstowe/doc,LLFourn/doc,jonathanstowe/doc,dnmfarrell/doc,dmaestro/doc,antquinonez/doc,cygx/doc,muraiki/doc,gfldex/doc,cygx/doc,tbrowder/doc,dnmfarrell/doc,antquinonez/doc,stmuk/doc,hoelzro/perl6-doc,gfldex/doc,gfldex/doc,dmaestro/doc,hoelzro/perl6-doc,hoelzro/perl6-doc,LLFourn/doc,muraiki/doc,MasterDuke17/doc,jonathanstowe/doc,stmuk/doc,dmaestro/doc,dha/doc,jonathanstowe/doc,jkeenan/doc,muraiki/doc,tbrowder/doc,MasterDuke17/doc,perl6/doc,MadcapJake/doc,antquinonez/doc,jkeenan/doc,MasterDuke17/doc,MadcapJake/doc,dha/doc,perl6/doc,tbrowder/doc,dha/doc,LLFourn/doc,jkeenan/doc,antquinonez/doc