build: add -DMINIUPNP_STATICLIB for new version

libminiupnpc changed their required static define to the much more sane
"MINIUPNP_STATICLIB". Sadly, they don't respect the old "STATICLIB" for
back-compat. Define them both since the old one didn't seem to be conflicting
anywhere.

Also go ahead and split out the cppflags so that they can be applied only where
they're needed. This will help us to build dll's from our libs without having
their import/export declspecs poisoned.
depends: bump openssl to 1.0.1i

This is the forward-port of bba01750226745d6666d587cabe57c321fde0875.
depends: bump miniupnpc to 1.9.20140701.

This is the forward-port of a9c6eef915ee264ccf4169d5e8769a6be1fa101a
Perform CVerifyDB on pcoinsdbview instead of pcoinsTip

Bypassing the main coins cache allows more thorough checking with the same
memory budget.

This has no effect on performance because everything ends up in the child
cache created by VerifyDB itself.

It has bugged me ever since #4675, which effectively reduced the
number of checked blocks to reduce peak memory usage.

- Pass the coinsview to use as argument to VerifyDB

- This also avoids that the first `pcoinsTip->Flush()` after VerifyDB
  writes a large slew of unchanged coin records back to the database.
add missing header end comments

- ensures a consistent usage in header files
- also add a blank line after the copyright header where missing
- also remove orphan new-lines at the end of some files
add missing copyright headers
overhaul serialization code

The implementation of each class' serialization/deserialization is no longer
passed within a macro. The implementation now lies within a template of form:

template <typename T, typename Stream, typename Operation>
inline static size_t SerializationOp(T thisPtr, Stream& s, Operation ser_action, int nType, int nVersion) {
    size_t nSerSize = 0;
    /* CODE */
    return nSerSize;
}

In cases when codepath should depend on whether or not we are just deserializing
(old fGetSize, fWrite, fRead flags) an additional clause can be used:
bool fRead = boost::is_same<Operation, CSerActionUnserialize>();

The IMPLEMENT_SERIALIZE macro will now be a freestanding clause added within
class' body (similiar to Qt's Q_OBJECT) to implement GetSerializeSize,
Serialize and Unserialize. These are now wrappers around
the "SerializationOp" template.
remove fields of ser_streamplaceholder

The nType and nVersion fields of stream objects are never accessed
from outside the class (or perhaps from the inside too, I haven't checked).
Thus no need to have them in a placeholder, whose only purpose is to
fill the "Stream" template parameter in serialization implementation.
rework overhauled serialization methods to non-static

Thanks to Pieter Wuille for most of the work on this commit.
I did not fixup the overhaul commit, because a rebase conflicted
with "remove fields of ser_streamplaceholder".
I prefer not to risk making a mistake while resolving it.
Use CSizeComputer to avoid counting sizes in SerializationOp
Merge pull request #4768

2e28031 Perform CVerifyDB on pcoinsdbview instead of pcoinsTip (Wladimir J. van der Laan)
Add deeper XML checking to update-translation script

- Catch problems such as mismatched formatting characters. Remove
  messages that can give problems at runtime.

- Also remove unfinished/untranslated messages, they just take up space
  in the ts and waste parsing time.

Fixes #4774.
Update translations after update script improvements
Merge pull request #4776

6f5d33b Update translations after update script improvements (Wladimir J. van der Laan)
da59f28 Add deeper XML checking to update-translation script (Wladimir J. van der Laan)
Merge pull request #4780

4d04492 add missing copyright headers (Philip Kaufmann)
Merge pull request #4767

b144a74 depends: bump miniupnpc to 1.9.20140701. (Cory Fields)
f628127 depends: bump openssl to 1.0.1i (Cory Fields)
9f7f504 build: add -DMINIUPNP_STATICLIB for new version (Cory Fields)
Merge pull request #4779

093303a add missing header end comments (Philip Kaufmann)
Merge pull request #4737

31e9a83 Use CSizeComputer to avoid counting sizes in SerializationOp (Pieter Wuille)
84881f8 rework overhauled serialization methods to non-static (Kamil Domanski)
5d96b4a remove fields of ser_streamplaceholder (Kamil Domanski)
3d796f8 overhaul serialization code (Kamil Domanski)
CheckProof method for CBlockHeader and CBlockIndex
Create Proof class