FS-353
Signed-off-by: Travis Cross <tc@traviscross.com>

mod_v8: Use parallel build by default. Use configure flag "--disable-parallel-build-v8" to disable it. It's disabled by default for Debian build scripts, since parallel build has some issues with cowbuilder.

This is currently breaking the build.  We'll get that fixed and add
mod_v8 back in after things slow down.

...at your own risk.  cURL has had some serious security issues over
the years, so if you're using an ancient version, I hope that you're
receiving security patches from your vendor.

The version set here is to accommodate CentOS 6.

FS-353

FS-353

This purges libcurl from our tree and requires it to be present on the
system for building and running FreeSWITCH.

FS-353

These modules use curl and we'll be adding in some bits to the
CPPFLAGS.

Too much was staged accidentally on that last commit.

This reverts commit f1126272.

Mike and Seven said this is desirable.

FS-353: allow people to use 5 year old and with known segfault issues pcre because centos6 can't seem to use a lib less that 5 years old, use with older libs at your own risk

We don't currently have a use-case for this, but we'd been
distributing this file in packaging as part of libfreeswitch-dev.

We check whether the dir is there before trying to bootstrap, so it
didn't do any harm, but they shouldn't be there.