DWDS/Dialing Concordance Code

+ merged -r1321:1383 svn+ssh://mukau@.../p/ddc-concordance/code/ddc/branches/delwin-merge2 into trunk
- includes accepted changes from branch delwin@...:1352

+ fixes for daughter-specific subcorpus path-handling in BranchServer requests

+ UNIX/TCP socket abstraction twiddling: added address-wrapper struct CSocketAddr
- replaced CHost fields m_HostAddr, m_Port, m_SocketPath with abstract m_SockAddr

+ work in progress: parse & honor daughter-specific subcorpus paths in BranchServer requests

+ tweaks for CHost::CheckValid()

+ fixed typo

+ UNIX socket fixes
- force socket permissions directly in create_unix_domain_socket(), not CHost::CreateSocket()
- throw exception if create_unix_domain_socket() fails (e.g. no permissions)
- see also https://sourceforge.net/p/ddc-concordance/tickets/15/

+ TAB-input tweaks
- silently ignore known stuff (%%$DDC:tokid.) and other comments (%%)
- CDocumentIterator::ReadTabFormatDocument(): log document 'filenames' for TAB-import (for streaming mode)

+ MaxInputLoadIndexSize / MaxTokenCountInOnePeriod consistency hack - https://sourceforge.net/p/ddc-concordance/tickets/9/

+ fixed 'make distcheck' https://sourceforge.net/p/ddc-concordance/tickets/8/
- updated -I flags in m4/common.am
- re-ordered SUBDIRS in src/Makefile.am (CommonLib must precede anything using ddcConfigNoAuto.h)