option('libproxy_support', type: 'boolean', value: true, description: 'support for libproxy')
option('gnome_proxy_support', type: 'boolean', value: true, description: 'support for GNOME proxy configuration')
option('tls_support', type: 'boolean', value: true, description: 'support for GNUTLS')
option('ca_certificates_path', type: 'string', value: '', description: 'path to system Certificate Authority list')
option('pkcs11_support', type: 'boolean', value: true, description: 'support for pkcs11')
option('installed_tests', type: 'boolean', value: false, description: 'enable installed unit tests')

option('libproxy_support', type: 'boolean', value: true, description: 'support for libproxy proxy configration')
option('gnome_proxy_support', type: 'boolean', value: true, description: 'support for GNOME desktop proxy configuration')
option('tls_support', type: 'boolean', value: true, description: 'support for TLS using GnuTLS')
option('ca_certificates_path', type: 'string', value: '', description: 'path to system Certificate Authority list')
option('pkcs11_support', type: 'boolean', value: true, description: 'support for PKCS#11 using p11-kit')
option('installed_tests', type: 'boolean', value: false, description: 'enable installed tests')

Improve descriptions of build options
Improve descriptions of build options
