Optimized regex parser for Curl dependency manager

[pavsorab]

Fixes :

• Removed the capturing group that matches an optional text before curl (?:\S+[ \t])? which was causing slowness.
• Removed the capturing group that matches the options and flags (-.* and \S+). Hence minimised use of greedy quantifier.
• Changed the capturing group that matches the URL to (\S+) to only capture the URL itself.

Miscellaneous fix :

• Fixed a typo for wget test data in automated functional test

[loredous]

Overall code looks clean. Please make changes to avoid the mentioned exception/failure.

[loredous]

PR looks good with latest changes. Approving for merge