The serf library is a C-based HTTP client library built upon the
Apache Portable Runtime (APR) library. It multiplexes connections,
running the read/write communication asynchronously. Memory copies
and transformations are kept to a minimum to provide high
performance operation.
===> The following configuration options are available for serf-1.3.10_1:
DOCS=on: Build and/or install documentation
====> Kerberos support: you can only select none or one of them
GSSAPI_BASE=off: Heimdal Kerberos (base)
GSSAPI_HEIMDAL=off: Heimdal Kerberos (security/heimdal)
GSSAPI_MIT=off: MIT Kerberos (security/krb5)
===> Use 'make config' to modify these settings