Do not support parenthesis in URLs

[ghost]

forwarded from: https://bugs.launchpad.net/ubuntu/+source/urlscan/+bug/385955 To reproduce:

 echo '\nhttp://github.com/(firecat53)/urlscan'|urlscan

From: http://tools.ietf.org/html/rfc3986#page-12

---

2.2. Reserved Characters

URIs include components and subcomponents that are delimited by characters in the "reserved" set. These characters are called "reserved" because they may (or may not) be defined as delimiters by the generic syntax, by each scheme-specific syntax, or by the implementation-specific syntax of a URI's dereferencing algorithm. If data for a URI component would conflict with a reserved character's purpose as a delimiter, then the conflicting data must be percent-encoded before the URI is formed.

  reserved    = gen-delims / sub-delims

  gen-delims  = ":" / "/" / "?" / "#" / "[" / "]" / "@"

  sub-delims  = "!" / "$" / "&" / "'" / "(" / ")"
              / "*" / "+" / "," / ";" / "="

[ghost]

Forwarded to Debian BTS https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=771506

[ghost]

see https://github.com/firecat53/urlscan/pull/12

[firecat53]

Fixed by #12