Update www/p5-REST-Client to to version 273 from CPAN.

From its CHANGES file:

• Add ContentFile that will allow writing responses directly to file or process using a call back through LWP::UserAgent
• Seperated CA file from SSL cert and SSL key directives to allow for hostname verificaiton and ca file specification independently. Thanks David Imbs.
• No longer depends on Crypt::SSLeay

As CHANGES notes, this version ceases to depend on Crypt::SSLeay.
Instead, it now depends on LWP::Protocol::https that is also a dependency of Crypt::SSLeay.
LWP::Protocol::https was unbundled from p5-libwww (libwww-perl) in v6.02.

PR: 223083
Approved by: michelle@sorbs.net (maintainter timeout, 2 weeks)